For my account, I always have a "1 unread message" icon next to my trades, but I can't find it or get rid of it. I've clicked every trade and finished trade I have and it never seems to go away.

Hello,

If you click "Show canceled" on the top right of the completed trades list you will see a few more trades, and one of them will have the "unread message icon".

I think this is the trade called "MB" http://deckbox.org/trades/6124?s=10610

Thank you for your help! I think that was the problem :D