diff --git a/NEWS b/NEWS
index 6a7e2a33..177712fd 100644
--- a/NEWS
+++ b/NEWS
@@ -16,6 +16,8 @@ NEWS ( CHANGELOG and HISTORY )                                     HTMLPurifier
   did nothing.  Thanks David Rothstein for reporting.
 - Fix improper handling of Internet Explorer conditional comments
   by parser.  Thanks zmonteca for reporting.
+- Fix missing attributes bug when running on Mac Snow Leopard and APC.
+  Thanks sidepodcast for the fix.
 
 4.1.1, released 2010-05-31
 - Fix undefined index warnings in maintenance scripts.
diff --git a/library/HTMLPurifier/Generator.php b/library/HTMLPurifier/Generator.php
index 4a624172..f5310361 100644
--- a/library/HTMLPurifier/Generator.php
+++ b/library/HTMLPurifier/Generator.php
@@ -215,7 +215,10 @@ class HTMLPurifier_Generator
      *               permissible for non-attribute output.
      * @return String escaped data.
      */
-    public function escape($string, $quote = ENT_COMPAT) {
+    public function escape($string, $quote = null) {
+        // Workaround for APC bug on Mac Leopard reported by sidepodcast
+        // http://htmlpurifier.org/phorum/read.php?3,4823,4846
+        if ($quote === null) $quote = ENT_COMPAT;
         return htmlspecialchars($string, $quote, 'UTF-8');
     }