You must be new. Welcome to the forums. Enough trolling. My icon cache refreshes after a while. I use desktop activity manager (kills hildon), ApMeFo and who knows what else. Maybe one of those does the trick? OTOH, with this damned reboot issue I was having one never knows if it didn't just reboot.
In X Terminal Not as root killall hildon-desktop hildon-desktop will restart itself, and the menu will have all icons refreshed