diff --git a/CImage.php b/CImage.php
index cc0bf26..8693f9a 100644
--- a/CImage.php
+++ b/CImage.php
@@ -275,9 +275,12 @@ EOD;
     $info = list($width, $height, $type, $attr) = getimagesize($file);
     !empty($info) or $this->RaiseError("The file doesn't seem to be an image.");
     $mime = $info['mime'];
-    $time = filemtime($file);  
+    $lastModified = filemtime($file);  
+    $gmdate = gmdate("D, d M Y H:i:s", $lastModified);
 
-    if(isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= $time){  
+    if(!$this->verbose) { header('Last-Modified: ' . $gmdate . " GMT"); }
+
+    if(isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) == $lastModified){  
       if($this->verbose) {
         $this->Log("304 not modified");
         $this->VerboseOutput();
@@ -285,8 +288,6 @@ EOD;
       }
       header("HTTP/1.0 304 Not Modified");
     } else {  
-      $gmdate = gmdate("D, d M Y H:i:s", $time);
-
       if($this->verbose) {
         $this->Log("Last modified: " . $gmdate . " GMT");
         $this->VerboseOutput();
@@ -294,7 +295,6 @@ EOD;
       }
 
       header('Content-type: ' . $mime);  
-      header('Last-Modified: ' . $gmdate . " GMT");  
       readfile($file);
     }
     exit;
diff --git a/README.md b/README.md
index f249dae..82e2768 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,12 @@ Combine the parameters to get the desired behavior and resulting image. For exam
 Revision history
 -------------------------------------
 
+v0.4.x (latest)
+
+* Changed => to == on Modified-Since.
+* Always send Last-Modified-Header.
+
+
 v0.4 (2013-10-08)
 
 * Improved support for pre-defined sizes.
@@ -101,7 +107,8 @@ v0.4 (2013-10-08)
 * Added usage of all parameters to README.md
 * Added documentation here http://dbwebb.se/opensource/cimage
 * Adding `.gitignore`
-* Readding `cache` directory
+* Re-adding `cache` directory
+
 
 v0.3 (2012-10-02)
 
diff --git a/img.php b/img.php
index 0ade12a..3858295 100644
--- a/img.php
+++ b/img.php
@@ -24,9 +24,9 @@ set_exception_handler('myExceptionHandler');
 
 
 // Use preprocessing of images
-#define('PNG_FILTER',    '/usr/local/bin/optipng -q');
-#define('PNG_DEFLATE',   '/usr/local/bin/pngout -q');
-#define('JPEG_OPTIMIZE', '/usr/local/bin/jpegtran -copy none -optimize');
+define('PNG_FILTER',    '/usr/local/bin/optipng -q');
+define('PNG_DEFLATE',   '/usr/local/bin/pngout -q');
+define('JPEG_OPTIMIZE', '/usr/local/bin/jpegtran -copy none -optimize');
 
 
 // Append ending slash
@@ -151,13 +151,14 @@ else {
 
 
 
-// Display image if vebose mode
+// Display image if verbose mode
 if($verbose) {
   $query = array();
   parse_str($_SERVER['QUERY_STRING'], $query);
   unset($query['verbose']);
   unset($query['v']);
   unset($query['nocache']);
+  unset($query['nc']);
   $url1 = '?' . http_build_query($query);
   echo <<<EOD
 <a href=$url1><code>$url1</code></a><br>
diff --git a/img/kodim15.png b/img/kodim15.png
new file mode 100644
index 0000000..9a77b67
Binary files /dev/null and b/img/kodim15.png differ