Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.598
diff -u -p -r1.598 common.inc
--- includes/common.inc	10 Dec 2006 20:34:02 -0000	1.598
+++ includes/common.inc	11 Dec 2006 08:14:36 -0000
@@ -1507,6 +1507,8 @@ function drupal_build_css_cache($types, 
       /\*([^*\\\\]|\*(?!/))+\*/ |  # Remove comments that are not CSS hacks.
       [\n\r]                       # Remove line breaks.
       >x', '\1', $data);
+    // IE requires a space after parentheses.
+    $data = str_replace(')', ') ', $data);  
 
     // Create the CSS file.
     file_save_data($data, $csspath .'/'. $filename, FILE_EXISTS_REPLACE);