An uncommon but real side effect of the combination of no flags till round 10, and and auto-flagging when away, is this:

If you get booted for some reason early in the game (such as browser crash), and survive more than three rounds as an away, you'll be unable to unflag when you return.

This happened to me -- I had a pretty good natural position (corner), and my browser crashed in round two or three. I was away for three rounds (don't laugh -- slow computer), and ended up autoflagged.

When I finally got back, I was still alive, but flagged, and had no ability to unflag -- the checkbox wasn't available. It was a little strange playing actively, flagged, unable to unflag.

Perhaps autoflag / away should automatically undo if the person comes back?