diff --git a/Gruntfile.js b/Gruntfile.js
index e4f00bdb44..9b167e8f04 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -134,7 +134,8 @@ module.exports = function(grunt) {
       options: {
         reset: true,
         relaxerror: [
-            "Bad value X-UA-Compatible for attribute http-equiv on element meta."
+            "Bad value X-UA-Compatible for attribute http-equiv on element meta.",
+            "Element img is missing required attribute src."
         ]
       },
       files: {
diff --git a/components.html b/components.html
index dbe981c2a9..f2c5663d94 100644
--- a/components.html
+++ b/components.html
@@ -2778,22 +2778,22 @@ body { padding-bottom: 70px; }
       <div class="row">
         <div class="col-sm-6 col-md-3">
           <a href="#" class="thumbnail">
-            <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail" src="data:image/png;base64,">
+            <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail">
           </a>
         </div>
         <div class="col-sm-6 col-md-3">
           <a href="#" class="thumbnail">
-            <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail" src="data:image/png;base64,">
+            <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail" src="image/png;base64,">
           </a>
         </div>
         <div class="col-sm-6 col-md-3">
           <a href="#" class="thumbnail">
-            <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail" src="data:image/png;base64,">
+            <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail">
           </a>
         </div>
         <div class="col-sm-6 col-md-3">
           <a href="#" class="thumbnail">
-            <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail" src="data:image/png;base64,">
+            <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail">
           </a>
         </div>
       </div>
@@ -2815,7 +2815,7 @@ body { padding-bottom: 70px; }
       <div class="row">
         <div class="col-sm-6 col-md-4">
           <div class="thumbnail">
-            <img data-src="holder.js/300x200" alt="Generic placeholder thumbnail" src="data:image/png;base64,">
+            <img data-src="holder.js/300x200" alt="Generic placeholder thumbnail">
             <div class="caption">
               <h3>Thumbnail label</h3>
               <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
@@ -2825,7 +2825,7 @@ body { padding-bottom: 70px; }
         </div>
         <div class="col-sm-6 col-md-4">
           <div class="thumbnail">
-            <img data-src="holder.js/300x200" alt="Generic placeholder thumbnail" src="data:image/png;base64,">
+            <img data-src="holder.js/300x200" alt="Generic placeholder thumbnail">
             <div class="caption">
               <h3>Thumbnail label</h3>
               <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
@@ -2835,7 +2835,7 @@ body { padding-bottom: 70px; }
         </div>
         <div class="col-sm-6 col-md-4">
           <div class="thumbnail">
-            <img data-src="holder.js/300x200" alt="Generic placeholder thumbnail" src="data:image/png;base64,">
+            <img data-src="holder.js/300x200" alt="Generic placeholder thumbnail">
             <div class="caption">
               <h3>Thumbnail label</h3>
               <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
@@ -3141,7 +3141,7 @@ body { padding-bottom: 70px; }
     <div class="bs-example">
       <div class="media">
         <a class="pull-left" href="#">
-          <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image" src="data:image/png;base64,">
+          <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image">
         </a>
         <div class="media-body">
           <h4 class="media-heading">Media heading</h4>
@@ -3150,14 +3150,14 @@ body { padding-bottom: 70px; }
       </div>
       <div class="media">
         <a class="pull-left" href="#">
-          <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image" src="data:image/png;base64,">
+          <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image">
         </a>
         <div class="media-body">
           <h4 class="media-heading">Media heading</h4>
           Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
           <div class="media">
             <a class="pull-left" href="#">
-              <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image" src="data:image/png;base64,">
+              <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image">
             </a>
             <div class="media-body">
               <h4 class="media-heading">Media heading</h4>
@@ -3185,7 +3185,7 @@ body { padding-bottom: 70px; }
       <ul class="media-list">
         <li class="media">
           <a class="pull-left" href="#">
-            <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image" src="data:image/png;base64,">
+            <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image">
           </a>
           <div class="media-body">
             <h4 class="media-heading">Media heading</h4>
@@ -3193,7 +3193,7 @@ body { padding-bottom: 70px; }
             <!-- Nested media object -->
             <div class="media">
               <a class="pull-left" href="#">
-                <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image" src="data:image/png;base64,">
+                <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image">
               </a>
               <div class="media-body">
                 <h4 class="media-heading">Nested media heading</h4>
@@ -3201,7 +3201,7 @@ body { padding-bottom: 70px; }
                 <!-- Nested media object -->
                 <div class="media">
                   <a class="pull-left" href="#">
-                    <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image" src="data:image/png;base64,">
+                    <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image">
                   </a>
                   <div class="media-body">
                     <h4 class="media-heading">Nested media heading</h4>
@@ -3213,7 +3213,7 @@ body { padding-bottom: 70px; }
             <!-- Nested media object -->
             <div class="media">
               <a class="pull-left" href="#">
-                <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image" src="data:image/png;base64,">
+                <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image">
               </a>
               <div class="media-body">
                 <h4 class="media-heading">Nested media heading</h4>
@@ -3224,7 +3224,7 @@ body { padding-bottom: 70px; }
         </li>
         <li class="media">
           <a class="pull-right" href="#">
-            <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image" src="data:image/png;base64,">
+            <img class="media-object" data-src="holder.js/64x64" alt="Generic placeholder image">
           </a>
           <div class="media-body">
             <h4 class="media-heading">Media heading</h4>
diff --git a/css.html b/css.html
index 1eea9152ba..3542f87c05 100644
--- a/css.html
+++ b/css.html
@@ -2260,9 +2260,9 @@ For example, <code>&lt;section&gt;</code> should be wrapped as inline.
       <p>Keep in mind that Internet Explorer 8 lacks support for rounded corners.</p>
     </div>
     <div class="bs-example bs-example-images">
-      <img data-src="holder.js/140x140" src="data:image/png;base64," class="img-rounded" alt="A generic square placeholder image with rounded corners">
-      <img data-src="holder.js/140x140" src="data:image/png;base64," class="img-circle" alt="A generic square placeholder image where only the portion within the circle circumscribed about said square is visible">
-      <img data-src="holder.js/140x140" src="data:image/png;base64," class="img-thumbnail" alt="A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera">
+      <img data-src="holder.js/140x140" class="img-rounded" alt="A generic square placeholder image with rounded corners">
+      <img data-src="holder.js/140x140" class="img-circle" alt="A generic square placeholder image where only the portion within the circle circumscribed about said square is visible">
+      <img data-src="holder.js/140x140" class="img-thumbnail" alt="A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera">
     </div>
 {% highlight html %}
 <img src="..." alt="..." class="img-rounded">
diff --git a/examples/carousel/index.html b/examples/carousel/index.html
index a9d5d02bb5..7cea9bb4ff 100644
--- a/examples/carousel/index.html
+++ b/examples/carousel/index.html
@@ -78,7 +78,7 @@
       </ol>
       <div class="carousel-inner">
         <div class="item active">
-          <img src="data:image/png;base64," data-src="holder.js/900x500/auto/#777:#7a7a7a/text:First slide" alt="First slide">
+          <img data-src="holder.js/900x500/auto/#777:#7a7a7a/text:First slide" alt="First slide">
           <div class="container">
             <div class="carousel-caption">
               <h1>Example headline.</h1>
@@ -88,7 +88,7 @@
           </div>
         </div>
         <div class="item">
-          <img src="data:image/png;base64," data-src="holder.js/900x500/auto/#666:#6a6a6a/text:Second slide" alt="Second slide">
+          <img data-src="holder.js/900x500/auto/#666:#6a6a6a/text:Second slide" alt="Second slide">
           <div class="container">
             <div class="carousel-caption">
               <h1>Another example headline.</h1>
@@ -98,7 +98,7 @@
           </div>
         </div>
         <div class="item">
-          <img src="data:image/png;base64," data-src="holder.js/900x500/auto/#555:#5a5a5a/text:Third slide" alt="Third slide">
+          <img data-src="holder.js/900x500/auto/#555:#5a5a5a/text:Third slide" alt="Third slide">
           <div class="container">
             <div class="carousel-caption">
               <h1>One more for good measure.</h1>
@@ -123,19 +123,19 @@
       <!-- Three columns of text below the carousel -->
       <div class="row">
         <div class="col-lg-4">
-          <img class="img-circle" src="data:image/png;base64," data-src="holder.js/140x140" alt="Generic placeholder image">
+          <img class="img-circle" data-src="holder.js/140x140" alt="Generic placeholder image">
           <h2>Heading</h2>
           <p>Donec sed odio dui. Etiam porta sem malesuada magna mollis euismod. Nullam id dolor id nibh ultricies vehicula ut id elit. Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Praesent commodo cursus magna.</p>
           <p><a class="btn btn-default" href="#" role="button">View details &raquo;</a></p>
         </div><!-- /.col-lg-4 -->
         <div class="col-lg-4">
-          <img class="img-circle" src="data:image/png;base64," data-src="holder.js/140x140" alt="Generic placeholder image">
+          <img class="img-circle" data-src="holder.js/140x140" alt="Generic placeholder image">
           <h2>Heading</h2>
           <p>Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh.</p>
           <p><a class="btn btn-default" href="#" role="button">View details &raquo;</a></p>
         </div><!-- /.col-lg-4 -->
         <div class="col-lg-4">
-          <img class="img-circle" src="data:image/png;base64," data-src="holder.js/140x140" alt="Generic placeholder image">
+          <img class="img-circle" data-src="holder.js/140x140" alt="Generic placeholder image">
           <h2>Heading</h2>
           <p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
           <p><a class="btn btn-default" href="#" role="button">View details &raquo;</a></p>
@@ -153,7 +153,7 @@
           <p class="lead">Donec ullamcorper nulla non metus auctor fringilla. Vestibulum id ligula porta felis euismod semper. Praesent commodo cursus magna, vel scelerisque nisl consectetur. Fusce dapibus, tellus ac cursus commodo.</p>
         </div>
         <div class="col-md-5">
-          <img class="featurette-image img-responsive" src="data:image/png;base64," data-src="holder.js/500x500/auto" alt="Generic placeholder image">
+          <img class="featurette-image img-responsive" data-src="holder.js/500x500/auto" alt="Generic placeholder image">
         </div>
       </div>
 
@@ -161,7 +161,7 @@
 
       <div class="row featurette">
         <div class="col-md-5">
-          <img class="featurette-image img-responsive" src="data:image/png;base64," data-src="holder.js/500x500/auto" alt="Generic placeholder image">
+          <img class="featurette-image img-responsive" data-src="holder.js/500x500/auto" alt="Generic placeholder image">
         </div>
         <div class="col-md-7">
           <h2 class="featurette-heading">Oh yeah, it's that good. <span class="text-muted">See for yourself.</span></h2>
@@ -177,7 +177,7 @@
           <p class="lead">Donec ullamcorper nulla non metus auctor fringilla. Vestibulum id ligula porta felis euismod semper. Praesent commodo cursus magna, vel scelerisque nisl consectetur. Fusce dapibus, tellus ac cursus commodo.</p>
         </div>
         <div class="col-md-5">
-          <img class="featurette-image img-responsive" src="data:image/png;base64," data-src="holder.js/500x500/auto" alt="Generic placeholder image">
+          <img class="featurette-image img-responsive" data-src="holder.js/500x500/auto" alt="Generic placeholder image">
         </div>
       </div>
 
diff --git a/examples/theme/index.html b/examples/theme/index.html
index bfa8efdcb3..2573bb31d5 100644
--- a/examples/theme/index.html
+++ b/examples/theme/index.html
@@ -119,7 +119,7 @@
       <div class="page-header">
         <h1>Thumbnails</h1>
       </div>
-      <img data-src="holder.js/200x200" src="data:image/png;base64," class="img-thumbnail" alt="A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera">
+      <img data-src="holder.js/200x200" class="img-thumbnail" alt="A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera">
 
 
 
diff --git a/javascript.html b/javascript.html
index eb051a87bf..06a0bd021b 100644
--- a/javascript.html
+++ b/javascript.html
@@ -1703,13 +1703,13 @@ $('#myCollapsible').on('hidden.bs.collapse', function () {
         </ol>
         <div class="carousel-inner">
           <div class="item active">
-            <img src="data:image/png;base64," data-src="holder.js/900x500/auto/#777:#555/text:First slide" alt="First slide">
+            <img data-src="holder.js/900x500/auto/#777:#555/text:First slide" alt="First slide">
           </div>
           <div class="item">
-            <img src="data:image/png;base64," data-src="holder.js/900x500/auto/#666:#444/text:Second slide" alt="Second slide">
+            <img data-src="holder.js/900x500/auto/#666:#444/text:Second slide" alt="Second slide">
           </div>
           <div class="item">
-            <img src="data:image/png;base64," data-src="holder.js/900x500/auto/#555:#333/text:Third slide" alt="Third slide">
+            <img data-src="holder.js/900x500/auto/#555:#333/text:Third slide" alt="Third slide">
           </div>
         </div>
         <a class="left carousel-control" href="#carousel-example-generic" data-slide="prev">
@@ -1765,21 +1765,21 @@ $('#myCollapsible').on('hidden.bs.collapse', function () {
         </ol>
         <div class="carousel-inner">
           <div class="item active">
-            <img data-src="holder.js/900x500/auto/#777:#777" src="data:image/png;base64," alt="First slide image">
+            <img data-src="holder.js/900x500/auto/#777:#777" alt="First slide image">
             <div class="carousel-caption">
               <h3>First slide label</h3>
               <p>Nulla vitae elit libero, a pharetra augue mollis interdum.</p>
             </div>
           </div>
           <div class="item">
-            <img data-src="holder.js/900x500/auto/#666:#666" src="data:image/png;base64," alt="Second slide image">
+            <img data-src="holder.js/900x500/auto/#666:#666" alt="Second slide image">
             <div class="carousel-caption">
               <h3>Second slide label</h3>
               <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
             </div>
           </div>
           <div class="item">
-            <img data-src="holder.js/900x500/auto/#555:#5555" src="data:image/png;base64," alt="Third slide image">
+            <img data-src="holder.js/900x500/auto/#555:#5555" alt="Third slide image">
             <div class="carousel-caption">
               <h3>Third slide label</h3>
               <p>Praesent commodo cursus magna, vel scelerisque nisl consectetur.</p>