OK - this is a threads bug.
I have it fixed, but you'll need to reedit the forums to get all the permissions right again (as far as replys go).
Also cancel the ticket with infopop and tell them that I'll report the bug/fix.
Here's what was wrong.
The fields in the database for Bo_Read_Perm, and Bo_Write_Perm were varchar(250) meaning that they can hold 250 characters.
Prolly a typo in the createtable script, but the Bo_Reply_Perm field was only varchar(25) so the field just wasn't big enough to hold that many groups.
I adjusted it to the 250 size, so after you re-edit those affected boards permissions, it should have enough room to hold all the info.
Thanks,
Josh