Hi, kerphi.
I was using(adapting) the 1.0-beta7 version since october 2006.
I was getting similar error like the bug that was reported from (komaetil) http://www.phpfreechat.net/forum/viewtopic.php?id=871
Sometimes the chat was getting frozen when the number of chat-ers would be more that 5, sometimes when there were less than 5 chat-ers in the same time.
My questions is, did you located the cause of this error meantime and is the bug fixed in the Release 1.0-beta9?
Regards.