I ran across an odd ui bug for Rebellion.  Here's what I did to make it happen:

• First quit the match.
• Then I click and drag on the background, the typical selection box appears.
• I then move the cursor over the Main Menu button and rightclick.
• I'm returned to the Main menu and still have the selection box active and I can't get rid of it

This is a pretty harmless bug but seems like it could be easily fixed (prevent rightclicking of the Main menu button).  I've uploaded them to imgur for easier viewing as putting them really widens the post and is somewhat awkward.