Comment # 1 on bug 923929 from Neil Rickert

I have Gnome, XFCE and LXDE installed.  I am not seeing the icons that your
screenshot shows.  As far as I know, I am seeing the correct ones for KDE.

I have noticed, in the past, that sometimes my KDE menus seem to have been
changed to menus from XFCE and/or Gnome.  This happens only after using XFCE
(or maybe Gnome) for a while, and reverting to KDE.  This is infrequent.  But
then my use of XFCE is infrequent.

When that happens, I logout from the desktop, and use CTRL-ALT-F1 to get to a
terminal screen.  There, I do:

 rm -rf /var/tmp/kdecache-$USER

Then, when I login to KDE again, the proper menus are there.