Errors on exit of starter.fps

I get a bunch of messages like the following after quitting starter.fps:

Fatal: (sim/sceneObject.cc @ 825) Error, a GameBase (564d3608) isn't properly out of the bins!

I get more messages the longer I play. What is going wrong?

Thanks,

Ed

AMD 3200, 1GB RAM, ATI Radeon 9600XT 128MB Mandrake 10.1, GCC 3.4.1, ATI Linux Driver 3.14.6