Hmm - I tend to suspect that what was removed was likely a result of the
UltraVNC install. UltraVNC built on what came before, certainly including
RealVNC, and probably TightVNC as well, so it wouldn't surprise me that
there were, say, registry entries with those ID's in them as a part of,
perhaps, multiple versions of UltraVNC installed over a period of time.
I do the same--I use UltraVNC on servers--primarily so that I can see the
console session of a Windows 2000 server when connected via adminstrative
mode Terminal Services.