Well, I know you said you don't get 'Disconnected from the server' but your logs say something different. "* Disconnected" won't appear if you got kicked from a channel. And as I said before you don't get disconnected from channels. You part them or get removed from them.
Your description of what happens (i.e. nothing happening until you try to type something) sounds like the Software Caused Connection Abort error message, you may wish to read
this sticky thread. If you log status windows you're more likely to find the error message there or asking someone in the channel what your quit message was.
Regards,
