Also having the idle variation of this problem, with both mIRC 6.16 (w/ Sysreset) and Supybot, under WinXP SP2. It's happened at least once on every server I go to, but seems to favor Aniverse and Animerealm.

The funny thing is, it's off and on. Last time it happened was a couple weeks ago, and rebooting solved it. This time, it started last night and, after a couple disconnects while I was sleeping, worked fine for most of the day, after which there were a couple isolated incidents.

It dosen't seem to coincide with a general loss of connectivity, and although I do use ZoneAlarm, I have both IRC and Python set to the maximum permission level. What can be done short of making a "keep alive" script? Thanks.