no i remember the ajax chat inspired version too, it would always randomly stop updating messages and i'd have to constantly relog. the only "fix" was basically to have the client kick you from chat if it happened, which was just as cumbersome.
i know it was the flash client version that somehow figured out how to make a webpage cause a BSOD, but the prior build wasn't good either. i mean, that's why you chucked all that code in the bin and started over to begin with...
Dying of boredom, I'll try it all...