wonder why this would only happen to you when you are "running something CPU intensive on the foreground" and how mIRC could be the cause. Be interesting to know if some of the many other ppl with this problem have the same condition to its happening, altho i know many dont.
If its a mIRC problem, then why do many users say that they only have this problem when the xp firewall is enabled or only on certain servers and others say they have never had it? And i know for sure that it happens to some ppl when they are quite actively chatting in mIRC. You said it has an occasional "bad day" and i cant help but wonder if those bad days are only when you are on certain servers.
As Poppy said, lots of xp users have reported this, but not all have it. When something doesnt happen to ALL users ALL the time, by its very inconsistancy its hard to track down. People reporting specifics that are consistant helps do that. So far about the only sort of constant is those who say if they disable the firewall and stay off certain servers, it stops and even that doesnt apply to everyone.