diff --git a/mod/assign/feedback/editpdf/styles.css b/mod/assign/feedback/editpdf/styles.css
index 1303d35d256..3a365e39829 100644
--- a/mod/assign/feedback/editpdf/styles.css
+++ b/mod/assign/feedback/editpdf/styles.css
@@ -279,7 +279,6 @@ ul.assignfeedback_editpdf_menu {
 
 .dir-rtl .assignfeedback_editpdf_widget .commentdrawable a {
     float: left;
-    left: none;
     right: -17px;
     border-left: 0px;
     border-right: 1px solid #ccc;
diff --git a/mod/book/tool/print/print.css b/mod/book/tool/print/print.css
index 90d7153d30e..2d40ca1ca51 100644
--- a/mod/book/tool/print/print.css
+++ b/mod/book/tool/print/print.css
@@ -1,4 +1,4 @@
-
+/*csslint important:false */
 #page-mod-book-print {
     color: #000;
     background-color: #fff;
diff --git a/mod/choice/styles.css b/mod/choice/styles.css
index 7c3ba479f60..2de72fab815 100644
--- a/mod/choice/styles.css
+++ b/mod/choice/styles.css
@@ -1,61 +1,194 @@
-.path-mod-choice .results {border-collapse: separate;}
-.path-mod-choice .results .data {vertical-align:top;white-space: nowrap;}
-.path-mod-choice .button {text-align:center;}
-.path-mod-choice .attemptcell {width:5px;white-space: nowrap;}
-.path-mod-choice .anonymous,
-.path-mod-choice .names {margin-left:auto;margin-right:auto; width:80%;}
-.path-mod-choice .downloadreport {border-width:0;margin-left:10%;}
-.path-mod-choice .choiceresponse {width:100%;}
-.path-mod-choice .choiceresponse .picture {width:10px;white-space: nowrap;}
-.path-mod-choice .choiceresponse .fullname {width:100%;white-space: nowrap;}
+.path-mod-choice .results {
+  border-collapse: separate;
+}
 
-.path-mod-choice .responseheader {width: 100%; text-align: center; margin-top: 10px;}
-.path-mod-choice .choices .option label {vertical-align: top;}
-.path-mod-choice .choices .option input {vertical-align: middle;}
+.path-mod-choice .results .data {
+  vertical-align: top;
+  white-space: nowrap;
+}
+
+.path-mod-choice .button {
+  text-align: center;
+}
+
+.path-mod-choice .attemptcell {
+  width: 5px;
+  white-space: nowrap;
+}
+
+.path-mod-choice .anonymous,
+.path-mod-choice .names {
+  margin-left: auto;
+  margin-right: auto;
+  width: 80%;
+}
+
+.path-mod-choice .downloadreport {
+  border-width: 0;
+  margin-left: 10%;
+}
+
+.path-mod-choice .choiceresponse {
+  width: 100%;
+}
+
+.path-mod-choice .choiceresponse .picture {
+  width: 10px;
+  white-space: nowrap;
+}
+
+.path-mod-choice .choiceresponse .fullname {
+  width: 100%;
+  white-space: nowrap;
+}
+
+.path-mod-choice .responseheader {
+  width: 100%;
+  text-align: center;
+  margin-top: 10px;
+}
+
+.path-mod-choice .choices .option label {
+  vertical-align: top;
+}
+
+.path-mod-choice .choices .option input {
+  vertical-align: middle;
+}
 
 .path-mod-choice .horizontal,
-.path-mod-choice .vertical {margin-left: 10%;margin-right: 10%;}
-.path-mod-choice .horizontal .choices .option {padding-right: 20px; display: inline-block; white-space: normal;}
-.path-mod-choice .horizontal .choices .button {margin-top: 10px;}
-.path-mod-choice ul.choices li {list-style:none;}
-.path-mod-choice .results { text-align: center;}
-.path-mod-choice .results.anonymous .graph.horizontal {vertical-align: middle;text-align: left;width:70%;}
+.path-mod-choice .vertical {
+  margin-left: 10%;
+  margin-right: 10%;
+}
+
+.path-mod-choice .horizontal .choices .option {
+  padding-right: 20px;
+  display: inline-block;
+  white-space: normal;
+}
+
+.path-mod-choice .horizontal .choices .button {
+  margin-top: 10px;
+}
+
+.path-mod-choice ul.choices li {
+  list-style: none;
+}
+
+.path-mod-choice .results {
+  text-align: center;
+}
+
+.path-mod-choice .results.anonymous .graph.horizontal {
+  vertical-align: middle;
+  text-align: left;
+  width: 70%;
+}
 
 .path-mod-choice .results.anonymous .graph.vertical,
-.path-mod-choice .cell {vertical-align: bottom; text-align: center; }
-.path-mod-choice .results.anonymous th.header {border: 1px solid inherit;}
+.path-mod-choice .cell {
+  vertical-align: bottom;
+  text-align: center;
+}
+
+.path-mod-choice .results.names .header {
+  width: 10%;
+  white-space: normal;
+}
+
+.path-mod-choice .results.names .cell {
+  vertical-align: top;
+  text-align: left;
+}
 
-.path-mod-choice .results.names .header{width:10%; white-space: normal;}
-.path-mod-choice .results.names .cell{vertical-align: top; text-align: left;}
 .path-mod-choice .results.names .user,
-.path-mod-choice #yourselection {padding: 5px;}
+.path-mod-choice #yourselection {
+  padding: 5px;
+}
+
 .path-mod-choice .results.names .user .attemptaction,
 .path-mod-choice .results.names .user .image,
-.path-mod-choice .results.names .user .fullname{float:left;}
-.path-mod-choice .results.names .user .fullname{padding-left: 5px;}
-.path-mod-choice .results .data.header {width: 10%;}
-.path-mod-choice .responseaction {text-align: center;}
-.path-mod-choice .results .option {white-space: normal;}
-.path-mod-choice .response {overflow: auto;}
+.path-mod-choice .results.names .user .fullname {
+  float: left;
+}
+
+.path-mod-choice .results.names .user .fullname {
+  padding-left: 5px;
+}
+
+.path-mod-choice .results .data.header {
+  width: 10%;
+}
+
+.path-mod-choice .responseaction {
+  text-align: center;
+}
+
+.path-mod-choice .results .option {
+  white-space: normal;
+}
+
+.path-mod-choice .response {
+  overflow: auto;
+}
+
 .path-mod-choice .results .option,
 .path-mod-choice .results .numberofuser,
-.path-mod-choice .results .percentage {font-weight: bold; font-size: 108%;}
+.path-mod-choice .results .percentage {
+  font-weight: bold;
+  font-size: 108%;
+}
 
-#page-mod-choice-report .downloadreport ul li {list-style:none;padding: 0 20px; display: inline;float: left; }
-.path-mod-choice .clearfloat {float:none; clear:both;}
+#page-mod-choice-report .downloadreport ul li {
+  list-style: none;
+  padding: 0 20px;
+  float: left;
+}
+
+.path-mod-choice .clearfloat {
+  float: none;
+  clear: both;
+}
 
 /**
  * Override for RTL layout
  */
-.path-mod-choice.dir-rtl .horizontal .choices .option {padding-right:0px; padding-left: 20px; float:right;}
-.path-mod-choice.dir-rtl .results.anonymous .graph.horizontal {text-align: right;}
-.path-mod-choice.dir-rtl .results.anonymous { text-align: center; }
-.path-mod-choice.dir-rtl .results.names .cell{text-align: right;}
+.path-mod-choice.dir-rtl .horizontal .choices .option {
+  padding-right: 0px;
+  padding-left: 20px;
+  float: right;
+}
+
+.path-mod-choice.dir-rtl .results.anonymous .graph.horizontal {
+  text-align: right;
+}
+
+.path-mod-choice.dir-rtl .results.anonymous {
+  text-align: center;
+}
+
+.path-mod-choice.dir-rtl .results.names .cell {
+  text-align: right;
+}
+
 .path-mod-choice.dir-rtl .results.names .user .attemptaction,
 .path-mod-choice.dir-rtl .results.names .user .image,
 .path-mod-choice.dir-rtl .results.names .user .fullname,
-.path-mod-choice.dir-rtl .results.names .user .fullname{padding-left: 0px; padding-right: 5px;}
-.path-mod-choice.dir-rtl .downloadreport {margin-left:0;margin-right: 25%;}
+.path-mod-choice.dir-rtl .results.names .user .fullname {
+  padding-left: 0px;
+  padding-right: 5px;
+}
 
-#page-mod-choice-report.dir-rtl .downloadreport ul li{float:right;}
-#page-mod-choice-view.dir-rtl .reportlink {text-align: left;}
+.path-mod-choice.dir-rtl .downloadreport {
+  margin-left: 0;
+  margin-right: 25%;
+}
+
+#page-mod-choice-report.dir-rtl .downloadreport ul li {
+  float: right;
+}
+
+#page-mod-choice-view.dir-rtl .reportlink {
+  text-align: left;
+}
diff --git a/mod/data/preset/imagegallery/csstemplate.css b/mod/data/preset/imagegallery/csstemplate.css
index 7c755221999..284193283ca 100644
--- a/mod/data/preset/imagegallery/csstemplate.css
+++ b/mod/data/preset/imagegallery/csstemplate.css
@@ -22,8 +22,8 @@
 
 .picturediv {
   display: inline;
-  width: 150px;
-  height: 200px;
+  max-width: 150px;
+  max-height: 200px;
 }
 
 .inline {
@@ -39,4 +39,4 @@
 #singleimage img {
   width: 700px;
   height: auto;
-}
\ No newline at end of file
+}
diff --git a/mod/forum/styles.css b/mod/forum/styles.css
index f6fbd54ade9..f235493ea78 100644
--- a/mod/forum/styles.css
+++ b/mod/forum/styles.css
@@ -87,7 +87,6 @@
 #page-mod-forum-discuss .discussioncontrol.exporttoportfolio {text-align:left;}
 #page-mod-forum-discuss .discussioncontrol.displaymode {padding-right:10px;}
 #page-mod-forum-discuss .discussioncontrol.movediscussion {padding-right:10px;}
-#page-mod-forum-discuss .discussioncontrol.movediscussion .movediscussionoption {}
 
 /** Styles for view.php **/
 #page-mod-forum-view .forumaddnew {margin-bottom: 20px;}
diff --git a/mod/scorm/styles.css b/mod/scorm/styles.css
index a865799ccc8..0db8f86b0d1 100644
--- a/mod/scorm/styles.css
+++ b/mod/scorm/styles.css
@@ -85,7 +85,7 @@
 }
 
 #page-mod-scorm-player #scormpage .scoframe {
-    frameborder: 0;
+    border: 0;
 }
 
 #page-mod-scorm-player #scormpage #scorm_object {