I don't have access to the ftp since I'm at work, but I did a backup of the forum just after I did the maintanence. Here's what I found.
Forum 5
private-FRV8KL --- 1.44mb worth of stuff
forum_5.threads
index.html
I notice that the forum_5.threads file is blank while the one inside the private-FRV8kL folder is full of stuff. That's a busy forum while the forum 21 below isn't.
Forum 21
No folders
000001.cgi - 000006.cgi
000001.stick
forum_21.threads
forum_thread_data_0000.cgi
index.html
lastnumber.file
lastime.file
upgrade.txt
I guess this is good since it seems that all the data is there. I'm guessing it's just referencing it wrong somewhere? Not sure where to look though.
Also I guess I should do a backup BEFORE the maintanence lol