These are such minor things that I hesitate even to ask, but you did specifically call for UI improvements/issues.

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When I'm in a thread and press the reply button, it opens an edit window in the current page, which is awesome.  I love being able to look back and having the quote buttons still there.

However, in my user mind, it is a new page.  (As a developer, I know it isn't, but there you are.)  After it opens the edit box, I realize that I didn't mean to hit reply, I meant to hit edit on my post, so I hit the back button.  Unexpectedly to me (as a user), it brings me all the way back out of the thread to the Game / Forum summary screen.

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While I'm talking about browser history manipulation:  When I click "Mark all as read" in a Forum, it is entered in the history.  The back button seems not to do anything because it is just back to the same Forum page I'm already on.  I need to hit back again to get out of the forum into the main rpol.net screen.  I'd like to see that extra instance removed from the history.