Why menus and context menus of IntelliJ are instantly closing after beeing opened?

when I open a context menu or menu of the menubar it opens only for some milliseconds and then gets closed instantly. Did you ever experienced such behavior? Any su开发者_开发百科ggenstions to fix this?

I'm using Fedora 15 64-bit with Java-JDK 1.6.0_26 and I got an ultimate version of IntelliJ IDEA 10.5.1.

It happens when you are using Eclipse keymap, and there is an easy fix for this problem.

See also the related bug in IDEA tracker.