>Regarding your specific problem, have you tried running the >uncompressed version of jQuery in place of the compressed version? >While it wouldn't be sensible to deploy it on a live site for obvious >reasons, using the uncompressed versions for testing has huge benefits >for debugging as it's a lot easier to determine where a failure >occured.
Live sites should be running GZIP to compress static files--so there's no reason some should be running the pack version. I usually avoid running packed code because there's some inherited overhead while it "unpacks". Also, running packed code makes it extremely difficult to troubleshoot if users are reporting problems. -Dan