That is correct. You cannot close the list window while a listing is in progress. This is the intended behaviour. The reason for this is that not all servers send a list start numeric - they just send the 322 and 323 numerics. mIRC will open the list window and begin the list receive process either when the 321 list start numeric is received or when a 322 channel item is received. It will only end the list receive process once the 323 end of list numeric is received, or you disconnect from the server. At which point, the channels list file will be closed and unlocked and the list window can be closed.
