So zeitgeist is some GNOME-based program? Nepomuk is a desktop search engine that comes by default with KDE.

We're still not talking about many processes, though, from his 250 or so. My earlier comment had more to do with whether there were any suspect processes running. While I didn't recognize zeitgeist and didn't notice Nautilus, I didn't see anything disturbing.

Yes, it would probably be better if he didn't run both GNOME and KDE applications that duplicate functions, like Dolphin and Nautilus do, since it would limit the number of libraries in use. I use Firefox and Thunderbird by default, so I'm used to running GTK+ applications in a KDE environment and don't think of it as all that unusual.