Comment 291 for bug 187313

This issue is bugging me since 2007!
I had the same problem with PCLinuxOS 2007, openSUSE 11.0 and now openSUSE 11.1.

This is definitely not a Firefox-only issue, see also
http://forums.opensuse.org/applications/388116-11-0-firefox-3-right-click-menu-issues.html

It happens to me with all applications (it's just worst with Firefox, of course).

I really think this is a Xorg issue/bug! (mainly with KDE(?); PS/2 mouses(?))

The right-click menu sometimes seems to be too near by the mouse pointer, depending on the screen position. The bug only occurs if you do right-clicks at specific screen positions, mainly at the bottom-right corner (in the area(s) where the menu is 50:50 to be right-'above' or right-'below' the mouse pointer on a right click; => menu direction switching point). Then, an option (the nearest one reached) is selected and clicked (right click) at once. What is clicked depends on how the menu is shown, above or below the pointer.