The odds of GUID conflicts are absolutely astronomical, like hitting a $1 million lottery everyday for a week, but it actually happens (in the case of GUID's, that is.) It makes me wonder if the Beaver in our library and the one in Larry Robinson's library came from the same place, and that the color schemes were changed to look unique, but when recompiled, the author(s) forgot to edit the GUID. Just a wild guess.
Steve