In 2.21.0-1ubuntu2 it still worked, 2.21.1-1ubuntu1 was broken, but I'm not sure about the versions inbetween.
By submenu I mean for example in "Applications" "Internet" or "Office" have submenus, "Software-Center" doesn't have a submenu.
I think it might be a gtk upstream bug caused by this commit: http://git.gnome.org/browse/gtk+/commit/?h=gtk-2-22&id=43091232a2598c7d14834aec1e7b11806b1829c6
In 2.21.0-1ubuntu2 it still worked, 2.21.1-1ubuntu1 was broken, but I'm not sure about the versions inbetween.
By submenu I mean for example in "Applications" "Internet" or "Office" have submenus, "Software-Center" doesn't have a submenu.
I think it might be a gtk upstream bug caused by this commit: git.gnome. org/browse/ gtk+/commit/ ?h=gtk- 2-22&id= 43091232a2598c7 d14834aec1e7b11 806b1829c6
http://