KDE menu editor not saving changes

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http://forums.fedoraforum.org – as the title says, the menu editor is not saving the changes, as i create a new entry or modify/delete any existing one, the editor will show the changes, when i click save no error dialogs appear, but no changes will be made, if i close and open the editor again the changes dissapear. running kde 4.8.3 from the red hat repos on F17 x64 (HowTos)