[furst]

Here's a solution for anyone having problems with any of the following errors when trying to change usergroup settings:

MySQL Error : Unknown column 'minpoststoplay' in 'field list'

MySQL Error : Unknown column 'minreptoplay' in 'field list'

MySQL Error : Unknown column 'minreglengthtoplay' in 'field list'

Run this query and replace the * with whichever error you had (minpoststoplay, minreptoplay, or minreglengthtoplay):

ALTER TABLE usergroup ADD * INT( 10 ) NOT NULL

I had to run three queries before my usergroup permissions manager started working again.

Thanks to Zachariah who told me how to fix it in another thread.