--- common.inc	2009-12-17 01:47:10.000000000 +0500
+++ common.inc	2010-02-18 18:26:31.000000000 +0500
@@ -2009,8 +2009,11 @@ function drupal_load_stylesheet($file, $
       // Perform some safe CSS optimizations.
       $contents = preg_replace('<
         \s*([@{}:;,]|\)\s|\s\()\s* |  # Remove whitespace around separators, but keep space around parentheses.
-        /\*([^*\\\\]|\*(?!/))+\*/     # Remove comments that are not CSS hacks.
         >x', '\1', $contents);
+      $contents = preg_replace_callback(
+        '</\*[^*]*\*+([^/*][^*]*\*+)*/>', # Match all comment blocks and feed them to _proccess_comment().
+        "_proccess_comment",
+        $contents);
     }
 
     // Change back directory.
@@ -2021,6 +2024,36 @@ function drupal_load_stylesheet($file, $
 }
 
 /**
+ * Implements comment strip logic.
+ *
+ * This is the callback function for the preg_replace_callback() used in
+ * drupal_load_stylesheet_content(). Support for comment hacks is implemented here.
+ */
+function _proccess_comment($matches) {
+  static $keep_nextone = FALSE;
+  // End of IE-Mac hack, keep it.
+  if ($keep_nextone) {
+    $keep_nextone = FALSE;
+    return $matches[0];
+  }
+  else {
+    switch (strrpos($matches[0], '\\')) {
+      // No backslash, strip it.
+      case FALSE :
+        return '';
+        break;
+      // Ends with \*/ so is a multi line IE-Mac hack, keep this and the next one.
+      case drupal_strlen($matches[0])-3 :
+        $keep_nextone = TRUE;
+        // Fall through to default case.
+      // Single line IE-Mac hack, keep this.
+      default :
+        return $matches[0];
+    }
+  }
+}
+
+/**
  * Loads stylesheets recursively and returns contents with corrected paths.
  *
  * This function is used for recursive loading of stylesheets and