Forum Bug with Opera (browser) and click on user name
 

I use Opera 10.10 (maybe it's the same with other versions too) and when I click on user name next to post (to send PM, view all posts etc.) pop-up window opens at the top of page, not underneath user name. I first noticed it here and thought it's the beta. Now I tested with other browsers (IE and Iron), they show pop-up fine.

So, it's obviously Opera related. It may cause problems with other parts of various different pop-ups or other user interface interactions, please check it. I know there's not too many Opera users but I'm one of them.