AdiIRC

[2009-07-01 22:47:47]  * You are not on this channel, type /rejoin

Seems to be getting this a lot lately (past 2 months). No specific actions i could trace back that causes this. And it happens not for all the connected network at the same time. Only to all the channels of the same network i connected to.

I can still read all the text being said in a channel, using another client i can see i'm still in the userlist. I could be ctcp pinged, whois'ed. But clearly cannot type in the channel. Parting the channel doesn't solve the problem (tried it as much as part/join for 30 times with no evidence /rejoin helps at all, worst than placebo).
Only disconnecting and reconnect to the server solves it .. until it happens again in a few days.

I have my computer and AdiIRC running 24/7. This issues comes up few times in a week and is really annoying (the h*ll out of me) to have AdiIRC tells me i'm not longer in the channel in the middle of a conversation. Almost enough for me to ALT-F4 it and go back to mIRC.