Steps to reproduce: 1)run xfce4-popup-applicationsmenu 2)go into subcategory like "settings" or "games" with cursors 3)hit escape while highlighted item is inside some category 4)run xfce4-popup-applicationsmenu (how many times u want ;) ) Results (on my machine): xfce4-popup-applicationsmenu isn't showing up again, no matter how many times i run it. It's unclogging after clicking on xfce4-popup-applicationsmenu applet on panel - 1st is unclogging (no menu is showing up), 2nd rly works (menu is showing up)
I had this problem also. This might be related to bug 8472.
Can't reproduce this here.
*** This bug has been marked as a duplicate of bug 8472 ***