[Qt 4.6] Missing icons in menus
It seems that Qt 4.6 (or its Ubuntu package patches) contains a regression. Applications based on Qt 4 no longer display the icons relative to each action in the menus. It affects both actions in software top menu bars and actions in custom right-click menus.
Qt 4.5.3 is rendering the menu icons properly. The problem appeared when switching from Qt 4.5 to Qt 4.6 (in Lucid).