halkeye's helpful insight, I got my patch to work.http://goathack.livejournal.org:8030/patches/loginatcomment2.diff
Let me know if there are any aesthetic problems with it.
Update: with some more help from
halkeye, I have made the patch a little better. It would have told you that you logged in if you checked the 'login' box; now, it only tells you if you actually logged in.And it checks to see if there are any errors before trying to log you in.