Though there doesn't seem to be an accompanying news story, a post on the GameSpy Forums explains that the shareware version 2.52 of GameSpy 3D released yesterday (story) has been yoinked until a version can be provided that doesn't do whatever it was that it was doing that caused it to be yoinked, saying in the meantime they've "rolled back to v2.51 on FilePlanet." Thanks Ant.