See url. When hovering over the drop down button of the menulist, you get to see the :hover state (at least in the winXP theme, not in the classic theme). When clicking on the menulist, the drop down button should look pressed, that doesn't happen anymore with current trunk builds. This regressed when bug 279703 got checked in. Another issue I see (I guess I should file a new bug for this, perhaps): When opening the menulist popup, you don't see selected item in the popup directly selected, you see it getting selected just after the popup has been opened.
Created attachment 272644 [details] [diff] [review] Fix case on this atom Martijn, this fixes the hover/active state. The other issue should be a different bug, which may be harder to fix.
Ok, filed as bug 388423.