diff --git a/docs/assets/bootstrap.zip b/docs/assets/bootstrap.zip
index a02d277b6a..4a90bab808 100644
Binary files a/docs/assets/bootstrap.zip and b/docs/assets/bootstrap.zip differ
diff --git a/docs/assets/css/bootstrap.css b/docs/assets/css/bootstrap.css
index 4796e12887..7e39e62a17 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -1986,7 +1986,7 @@ table .span24 {
   filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#e6e6e6', GradientType=0);
   border-color: #e6e6e6 #e6e6e6 #bfbfbf;
   border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:dximagetransform.microsoft.gradient(enabled=false);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
   border: 1px solid #cccccc;
   border-bottom-color: #b3b3b3;
   -webkit-border-radius: 4px;
@@ -2108,7 +2108,7 @@ table .span24 {
   filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#0088cc', endColorstr='#0055cc', GradientType=0);
   border-color: #0055cc #0055cc #003580;
   border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:dximagetransform.microsoft.gradient(enabled=false);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
 }
 .btn-primary:hover,
 .btn-primary:active,
@@ -2133,7 +2133,7 @@ table .span24 {
   filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fbb450', endColorstr='#f89406', GradientType=0);
   border-color: #f89406 #f89406 #ad6704;
   border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:dximagetransform.microsoft.gradient(enabled=false);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
 }
 .btn-warning:hover,
 .btn-warning:active,
@@ -2158,7 +2158,7 @@ table .span24 {
   filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ee5f5b', endColorstr='#bd362f', GradientType=0);
   border-color: #bd362f #bd362f #802420;
   border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:dximagetransform.microsoft.gradient(enabled=false);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
 }
 .btn-danger:hover,
 .btn-danger:active,
@@ -2183,7 +2183,7 @@ table .span24 {
   filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#62c462', endColorstr='#51a351', GradientType=0);
   border-color: #51a351 #51a351 #387038;
   border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:dximagetransform.microsoft.gradient(enabled=false);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
 }
 .btn-success:hover,
 .btn-success:active,
@@ -2208,7 +2208,7 @@ table .span24 {
   filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#5bc0de', endColorstr='#2f96b4', GradientType=0);
   border-color: #2f96b4 #2f96b4 #1f6377;
   border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:dximagetransform.microsoft.gradient(enabled=false);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
 }
 .btn-info:hover,
 .btn-info:active,
@@ -2233,7 +2233,7 @@ table .span24 {
   filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#555555', endColorstr='#222222', GradientType=0);
   border-color: #222222 #222222 #000000;
   border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:dximagetransform.microsoft.gradient(enabled=false);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
 }
 .btn-inverse:hover,
 .btn-inverse:active,
@@ -2820,7 +2820,7 @@ input[type="submit"].btn.btn-mini {
   filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#333333', endColorstr='#222222', GradientType=0);
   border-color: #222222 #222222 #000000;
   border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:dximagetransform.microsoft.gradient(enabled=false);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
   -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 0 rgba(255, 255, 255, 0.075);
   -moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 0 rgba(255, 255, 255, 0.075);
   box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 0 rgba(255, 255, 255, 0.075);
diff --git a/less/mixins.less b/less/mixins.less
index c4b4ee82ee..e5471cabdd 100644
--- a/less/mixins.less
+++ b/less/mixins.less
@@ -395,7 +395,7 @@
 }
 // Reset filters for IE
 .reset-filter() {
-  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  filter: e(%("progid:DXImageTransform.Microsoft.gradient(enabled = false)"));
 }