The error message means something went wrong with the Panda3D support for fmod, perhaps at the time Panda3D was compiled. Or it means you’re loading a very old version of libp3fmod_audio.so, or something is wrong with libp3fmod_audio.so in general.
Did you use a precompiled version of Panda? Which one? Or did you build your own?
i have successfully compiled panda3d 1.8 from CVS on my fedora 15 x86_64 not too long ago and i had no trouble with file systems or anything else for that matter. also it ran my simple cube code flawlessly…