Jquery ajax request works in some pages and in others it doesnt

[eluser]iceuser[/eluser]
[quote author="vitoco" date="1340915019"]i think that you need to debug your server side script.[/quote]

i have spent several hours debugging it client and server side but the problem seems to exist on Firefox and Chrome... as i explained above...

It can't simply work for months and start going crazy for 2 browsers only and only on MAC!

This is insane!!