Hello, When using asp.net ajax (scriptmanager, timer, updatepanel) with ie8, after certain time (~3h) IE breaks with null object, constructor, or paramArray (depending on the asp.net code). Even with the simplest timer (no ajax, no updatepanel) ie8 still breaks. On every other browser it works fine, and if I code the ajax myself it works. Since google and msdn forums turned up nothing I'm wondering if anybody here has had similar problems with ie8 browser.