Index: misc/drupal.js
===================================================================
RCS file: /cvs/drupal/drupal/misc/drupal.js,v
retrieving revision 1.29
diff -u -p -r1.29 drupal.js
--- misc/drupal.js	14 Oct 2006 02:39:48 -0000	1.29
+++ misc/drupal.js	14 Dec 2006 15:54:06 -0000
@@ -57,6 +57,10 @@ Drupal.redirectFormButton = function (ur
           // Firefox 1.0.x hack: Remove (corrupted) control characters
           response = response.replace(/[\f\n\r\t]/g, ' ');
           if (window.opera) {
+            // Opera-hack: it fires this function twice on the first upload.
+            if (response == 0) {
+              return;
+            }
             // Opera-hack: it returns innerHTML sanitized.
             response = response.replace(/"/g, '"');
           }