diff --git a/frameworks/compass/stylesheets/compass/css3/_columns.scss b/frameworks/compass/stylesheets/compass/css3/_columns.scss
index f08cae3e..f425a68b 100644
--- a/frameworks/compass/stylesheets/compass/css3/_columns.scss
+++ b/frameworks/compass/stylesheets/compass/css3/_columns.scss
@@ -7,35 +7,35 @@
 //     @include columns(20em 2)
 @mixin columns($width-and-count) {
   @include experimental(columns, $width-and-count,
-    -moz, -webkit, -o, -ms, not -khtml, official
+    -moz, -webkit, not -o, -ms, not -khtml, official
   );
 }
 
 // Specify the number of columns
 @mixin column-count($count) {
   @include experimental(column-count, $count,
-    -moz, -webkit, -o, -ms, not -khtml, official
+    -moz, -webkit, not -o, -ms, not -khtml, official
   );
 }
 
 // Specify the gap between columns e.g. `20px`
 @mixin column-gap($width) {
   @include experimental(column-gap, $width,
-    -moz, -webkit, -o, -ms, not -khtml, official
+    -moz, -webkit, not -o, -ms, not -khtml, official
   );
 }
 
 // Specify the width of columns e.g. `100px`
 @mixin column-width($width) {
   @include experimental(column-width, $width,
-    -moz, -webkit, -o, -ms, not -khtml, official
+    -moz, -webkit, not -o, -ms, not -khtml, official
   );
 }
 
 // Specify the width of the rule between columns e.g. `1px`
 @mixin column-rule-width($width) {
   @include experimental(rule-width, $width,
-    -moz, -webkit, -o, -ms, not -khtml, official
+    -moz, -webkit, not -o, -ms, not -khtml, official
   );
 }
 
@@ -43,7 +43,7 @@
 // This works like border-style.
 @mixin column-rule-style($style) {
   @include experimental(rule-style, unquote($style),
-    -moz, -webkit, -o, -ms, not -khtml, official
+    -moz, -webkit, not -o, -ms, not -khtml, official
   );
 }
 
@@ -51,7 +51,7 @@
 // This works like border-color.
 @mixin column-rule-color($color) {
   @include experimental(rule-color, $color,
-    -moz, -webkit, -o, -ms, not -khtml, official
+    -moz, -webkit, not -o, -ms, not -khtml, official
   );
 }
 
@@ -66,6 +66,6 @@
 @mixin column-rule($width, $style: false, $color: false) {
   $full : -compass-space-list(compact($width, $style, $color));
   @include experimental(column-rule, $full,
-    -moz, -webkit, -o, -ms, not -khtml, official
+    -moz, -webkit, not -o, -ms, not -khtml, official
   );
 }
diff --git a/test/fixtures/stylesheets/compass/css/columns.css b/test/fixtures/stylesheets/compass/css/columns.css
index 3ec721db..7b011b83 100644
--- a/test/fixtures/stylesheets/compass/css/columns.css
+++ b/test/fixtures/stylesheets/compass/css/columns.css
@@ -2,61 +2,52 @@
   -webkit-columns: 20em 5;
   -moz-columns: 20em 5;
   -ms-columns: 20em 5;
-  -o-columns: 20em 5;
   columns: 20em 5; }
 
 .column-count {
   -webkit-column-count: 5;
   -moz-column-count: 5;
   -ms-column-count: 5;
-  -o-column-count: 5;
   column-count: 5; }
 
 .column-gap {
   -webkit-column-gap: 10px;
   -moz-column-gap: 10px;
   -ms-column-gap: 10px;
-  -o-column-gap: 10px;
   column-gap: 10px; }
 
 .column-width {
   -webkit-column-width: 90px;
   -moz-column-width: 90px;
   -ms-column-width: 90px;
-  -o-column-width: 90px;
   column-width: 90px; }
 
 .column-rule-width {
   -webkit-rule-width: 1px;
   -moz-rule-width: 1px;
   -ms-rule-width: 1px;
-  -o-rule-width: 1px;
   rule-width: 1px; }
 
 .column-rule-style {
   -webkit-rule-style: dotted;
   -moz-rule-style: dotted;
   -ms-rule-style: dotted;
-  -o-rule-style: dotted;
   rule-style: dotted; }
 
 .column-rule-color {
   -webkit-rule-color: blue;
   -moz-rule-color: blue;
   -ms-rule-color: blue;
-  -o-rule-color: blue;
   rule-color: blue; }
 
 .column-rule {
   -webkit-column-rule: 1px solid blue;
   -moz-column-rule: 1px solid blue;
   -ms-column-rule: 1px solid blue;
-  -o-column-rule: 1px solid blue;
   column-rule: 1px solid blue; }
 
 .column-rule-spaced {
   -webkit-column-rule: 1px solid blue;
   -moz-column-rule: 1px solid blue;
   -ms-column-rule: 1px solid blue;
-  -o-column-rule: 1px solid blue;
   column-rule: 1px solid blue; }