I'm going to be bugging again :-)
I think as many as possible "Obsoletes" should have an explicit version. This case is a perfect exemple : If some day, for some reason, the company who first started tuxracer (or another ones who got the rights to the name and such) continues the game, even maybe basing it on a current ppracer, then we may pretty much see a newer tuxracer obsolete ppracer! We'd then have a typical dependency loop that could have been avoided by just having put a version for the obsoletes *now*.
So for me, trying to look in the future as much as possible, what should be done here is :
Obsoletes: tuxracer <= 0.61
Matthias