In Opera 10.10 when I click the username link to open the popup box to have user options like PM, View Profile and such. It's not working properly. If I scroll down the page the box is obove the window. Basically this appears to be some CSS problem possibly with position. So it makes it very difficult for me to PM a member or view their profile from Opera. Thank you.
It was a known vBulletin issue with Opera (interestingly Opera 10.50 beta it worked fine). It's been fixed for the next release of vBulletin (4.0.3) already.