Once for the heck of it I /joined channel 666, but left pretty soon since no one else was there and it was boring. Now, however, every time I log on it starts me out in channel 666, no matter how many times I /join channel 100 and log off.

Channel 666 is the highest channel you have joined. It defaults to the highest when you log on. Andy knows about it and a fix is in the works.

In the meantime, type /channel leave (while in channel 666) and you will drop your highest channel back to 100 (if you don't have any between 100 and 666 that is)

Err.. Just type /leave 666. Ray fixed it for the next version so it joins the last channel you were using upon login, instead of the highest channel number you are subscribed to.

Err...thanks for the syntax correction, boss :-)