We had an internal discussion recently and the upshot of the discussion was that it turns out that some distributed component on the web appears to have used the UUID of a sample COM component.
I wonder sometimes why people do this. It's not like it's hard to run uuidgen and then copy the relevent GUIDs to your RGS file (and/or IDL file, or however it is you're defining and registering your class).
I guess the developers of the distributed component figured that they didn't have to follow the rules because everyone else was going to follow them.
And, no, I don't know what component it was, or why they decided to copy the sample.
So here's a good rule of thumb. When you're designing a COM component, you should probably use UUIDGEN (or UuidCreate()) to generate unique (and separate) GUIDS for the Interface ID, Class ID, and Library ID and App ID.