Sorry to tack on the end of this Topic, I would post in the, "Testers Request: cleanup New Activities" thread but I'm not a tester.
the togglecashew patch from Synaptic works well [PCLinuxOS KDE 4.8.3 Minime], although the screen blanks whilst the change is made for about two seconds. That's fine.
Installed 'clean_nac' which I saw in "Software Announcements".
I have no idea how to rename my cashew which is called "New Activity" ?