Index: sites/all/modules/contrib/advagg/advagg.inc
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- sites/all/modules/contrib/advagg/advagg.inc	(date 1457644588000)
+++ sites/all/modules/contrib/advagg/advagg.inc	(revision )
@@ -1364,7 +1364,7 @@
   _advagg_build_css_path(array(), $css_base_url . '/', $aggregate_settings);
   // Anchor all paths in the CSS with its base URL, ignoring external,
   // absolute paths, and urls that start with # or %23 (SVG).
-  $contents = preg_replace_callback('%url\(\s*+[\'"]?+(?![a-z]++:|/|\#|\%23+)([^\'"()\s]++)[\'"]?+\s*+\)%i', '_advagg_build_css_path', $contents);
+  $contents = preg_replace_callback('%url\(\s*+[\'"]?+(?![a-z]++:|/|\#|\%23+)([^\'"\)]++)[\'"]?+\s*+\)%i', '_advagg_build_css_path', $contents);
 
   // Change context back.
   advagg_context_switch($aggregate_settings, 1);