Don't bork Safari by removing spaces in front of parens in @media lines.

src/com/yahoo/platform/yui/compressor/CssCompressor.java

@@ -85,7 +85,14 @@ public void compress(Writer out, int linebreakpos)
         }
         m.appendTail(sb);
         css = sb.toString();
+
+        // Remove spaces before the things that should not have spaces before them.
         css = css.replaceAll("\\s+([!{};:>+\\(\\)\\],])", "$1");
+
+        // Put the space back in some cases, to support stuff like
+        // @media screen and (-webkit-min-device-pixel-ratio:0){
+        css = css.replaceAll("(@media[^{]*[^\\s])\\(", "$1 (");        
+
         css = css.replaceAll("___PSEUDOCLASSCOLON___", ":");
 
         // Remove the spaces after the things that should not have spaces after them.