Edit: However when going back to edit my post, viewing my atachment through the "Post Preview" worked just fine.
LostStraw - can you tell me what browser you are using? Can you recreate this issue in another browser?
Fair enough LC ... the one thing I still try to understand is FF's handling of pop-up and such. It is so robust that I think it goes a little crazy sometimes!
Tab Mix Plus
Okay meta and LC that is a FF specific setting - not the board. I tried it in IE 7 and no problem opening in another in-session tab. I also have the FF plug-in Tab Mix Plus that has allowed me to change the behaviour of how the tabe opens. I hope that helps?