Hi Carolyn and Lud@,
I must admit I would have suggested that as well.
If the iChat 4 setting for Remembering Chats had been set there is nothing in iChat 5 to reset it.
In Theory clearing the window and Quitting iChat should delete the item from the .plist
Deleting the said .plist and restarting iChat would have caused iChat to recreate the .plist from Defaults and the Remember Chats Across Launch item would not be there.
What we could do with knowing now is, does the Window have any info at the top as to who and/or what room the chat is associated with ?
It may pay to check the File Menu of iChat to Check if this "Chat" that keeps popping up is in the Recents lists.
8:33 PM Tuesday; September 1, 2009
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"