Hi,
I’m pretty new to WordPress, but I’ve encountered this problem too since upgrading to 2.5.1. I haven’t looked into why this problem is occuring, but I do have a quick/dirty workaround to disable autosave completely.
Make a backup copy of /wp-includes/js/autosave.js, then after line 135:
var autosave = function() {
add the line:
return;
Fingers crossed for an official patch soon!
