make dropdowns use unicode character for :after

bootstrap.css

@@ -6,7 +6,7 @@
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Designed and built with all the love in the world @twitter by @mdo and @fat.
- * Date: Thu Jan  5 15:42:23 PST 2012
+ * Date: Thu Jan  5 15:46:10 PST 2012
  */
 html, body {
   margin: 0;
@@ -1486,7 +1486,7 @@ i {
   filter: alpha(opacity=30);
   -moz-opacity: 0.3;
   opacity: 0.3;
-  content: "↓";
+  content: "\2193";
 }
 .dropdown:hover .dropdown-toggle:after {
   filter: alpha(opacity=100);

bootstrap.min.css

@@ -267,7 +267,7 @@ i{background-image:url(docs/assets/img/glyphicons-halflings-sprite.png);backgrou
 .minus{background-position:-432px -96px;}
 .asterisk{background-position:-456px -96px;}
 .dropdown{position:relative;}
-.dropdown-toggle:after{display:inline-block;width:0;height:0;margin-top:8px;margin-left:6px;text-indent:-99999px;vertical-align:top;border-left:4px solid transparent;border-right:4px solid transparent;border-top:4px solid #ffffff;filter:alpha(opacity=30);-moz-opacity:0.3;opacity:0.3;content:"↓";}
+.dropdown-toggle:after{display:inline-block;width:0;height:0;margin-top:8px;margin-left:6px;text-indent:-99999px;vertical-align:top;border-left:4px solid transparent;border-right:4px solid transparent;border-top:4px solid #ffffff;filter:alpha(opacity=30);-moz-opacity:0.3;opacity:0.3;content:"\2193";}
 .dropdown:hover .dropdown-toggle:after{filter:alpha(opacity=100);-moz-opacity:1;opacity:1;}
 .dropdown-menu{position:absolute;top:40px;z-index:900;float:left;display:none;min-width:160px;max-width:220px;_width:160px;padding:6px 0;margin-left:0;margin-right:0;background-color:#ffffff;border-color:#999;border-color:rgba(0, 0, 0, 0.2);border-style:solid;border-width:0 1px 1px;-webkit-border-radius:0 0 6px 6px;-moz-border-radius:0 0 6px 6px;border-radius:0 0 6px 6px;-webkit-box-shadow:0 2px 4px rgba(0, 0, 0, 0.2);-moz-box-shadow:0 2px 4px rgba(0, 0, 0, 0.2);box-shadow:0 2px 4px rgba(0, 0, 0, 0.2);-webkit-background-clip:padding-box;-moz-background-clip:padding-box;background-clip:padding-box;zoom:1;}.dropdown-menu li{float:none;display:block;background-color:none;}
 .dropdown-menu .divider{height:1px;margin:5px 0;overflow:hidden;background-color:#eee;border-bottom:1px solid #ffffff;}

lib/dropdowns.less

@@ -16,7 +16,7 @@
   border-right: 4px solid transparent;
   border-top: 4px solid @white;
   .opacity(30);
-  content: "↓";
+  content: "\2193";
 }
 .dropdown:hover .dropdown-toggle:after {
   .opacity(100);