when you right click on an icon in kfm and select open-with
you get a window that allows you to type in a command or use
the menu browser to select and app to run.

When you click the browser you will receive a list of
groups.

However NO applications are listed in  those groups.
It just lists "This group is empty"

I've checked with kde's BTS and it does not appear there -
As well when compiled  from tgz's it works ok.