It's especially annoying in the chatroom. After an hour+ or so of inactivity on the board you'll be booted from the chatroom and required to log in again. Chatroom activity does not reset that timeout.
Since most people in a game chatroom are not active on the board, they tend to get booted in bunches, as many of us found out last Saturday.
The admins are aware of this, hopefully there are some settings that can be tweaked. For now I'd recommend that chatroom participants interact with the board after each quarter to avoid getting booted.