Does it make any difference when it just shows the number, not the description or address?
The general concensus seems to be that if the CLSID (the 32-character identifier string) doesn't show up with an associated "human-readable" description, there's something wrong with it.
I don't think an incomplete/partial entry in a HJT log necessarily indicates a "nasty"; a partial entry could probably also be the result of some sort of registry corruption, an incompletely/incorrectly uninstalled component, etc.
That's just my understanding though; I could be wrong.