diff --git a/advagg.inc b/advagg.inc
index ff5e73a..fb791d4 100644
--- a/advagg.inc
+++ b/advagg.inc
@@ -514,7 +514,7 @@ function advagg_get_info_on_files($files, $bypass_cache = FALSE, $run_alter = TR
           && (empty($cached_data[$info['cache_id']]) || $info !== $cached_data[$info['cache_id']])
           ) {
         // CACHE_PERMANENT isn't good here. Use 2 weeks from now + 0-45 days.
-        // The random 0 to 45 day addition is to prevent a cache stampeed.
+        // The random 0 to 45 day addition is to prevent a cache stampede.
         cache_set($info['cache_id'], $info, 'cache_advagg_info', round(REQUEST_TIME + 1209600 + mt_rand(0, 3888000), -3));
       }
 
@@ -1147,9 +1147,9 @@ function advagg_load_css_stylesheet($file, $optimize, $aggregate_settings = NULL
   }
   _advagg_build_css_path(NULL, $css_base_url . '/');
 
-  // Anchor all paths in the CSS with its base URL, ignoring external and
-  // absolute paths.
-  $contents = preg_replace_callback('/url\(\s*[\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\s*\)/i', '_advagg_build_css_path', $contents);
+  // Anchor all paths in the CSS with its base URL, ignoring external,
+  // absolute paths, and urls that start with # (SVG).
+  $contents = preg_replace_callback('/url\(\s*[\'"]?(?![a-z]+:|\/+|\#+)([^\'")]+)[\'"]?\s*\)/i', '_advagg_build_css_path', $contents);
 
   // Change context back.
   advagg_context_css($aggregate_settings, 1);
@@ -1192,6 +1192,10 @@ function _advagg_build_css_path($matches, $base = NULL) {
   if (isset($base)) {
     $_base = $base;
   }
+  // Short circuit if no matches were passed in.
+  if (empty($matches)) {
+    return;
+  }
 
   // Prefix with base and remove '../' segments where possible.
   $path = $_base . $matches[1];