GUI Menu Editor not working

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http://crunchbanglinux.org – Just did a new install of CrunchBang-11-20120927-amd64. The GUI menu editor doesn't appear to be working properly. I can add new menu items and edit the ones that I add. I can't change pre-existing items (the ones that were there from the install). The Execute line is empty for the pre-existing items. I can enter a program name, but nothing gets saved to the menu.xml file. If I edit menu.xml directly, everything works fine. (HowTos)