Titlebar should just say "Screensaver Properties", no "xscreensaver", or version number, or build date.
Correction, the other dialogs seem to say "preferences" not "properties", so "screensaver preferences"
Is this a customization (seemless integration) into GNOME? If so, please split xscreensaver according to bug 59891. Xscreensavers could be a perfect part of KDE too. It does not require much effort, see bug 59891.
I'd love to see KDE use xscreensaver instead of their own cut-and-paste fork thing, yes. I'd really _prefer_ if upstream KDE did this, though. It would make a lot more sense.
(I don't see a reason to split the package though - we pretty much require GTK to be installed for any X install. I don't think xscreensaver does/should require libgnomeui anymore, just GTK.)
Fixed in 4.05-4.