Some more info:
after logging off and back into GNOME again, the menu entry is there suddenly.
So the menu item is created actually but doesn't appear in Alacarte until the
next session.
** Summary changed:
- New menu item no created when name field contains spaces
+ New menu item not
*** This bug is a duplicate of bug 64264 ***
** This bug has been marked a duplicate of bug 64264
gnome-menus doesn't send notification for new .desktop files
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New menu item not created when name field contains spaces
https://launchpad.net/bugs/67203
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