Redmine 1.x stable trunk + Opera 10.60 + Linux + Right click (or alt+left click) not working

Hi there.

As the title "says", I'm in a Linux Mint box + Opera 10.60 + apache + mod_passenger + Redmine 1.x stable trunk and the right click functionality (alt + left click for Opera) doesn't work. I tried with both Alt keys, Ctrl keys and still no luck.

I was looking at a thread where this issue was fixed, then I checked my context_menu.js and the fix is there, so I don't know what can be wrong.