VLC's codec information shows 24.000384fps for 24.00000000fps footage (real 24p video, not the 24/1.001fps aka 23.976fps)
It should just show 24fps, which made rise to a lot of confusion among users thinking there's something wrong with their footage... (or thinking a Nikon D90 shoots at a 'strange' framerate)
probably it's a math fault in converting the framelength in ms (41.66666666... for 24p footage) to the framerate in fps... (although not sure, as I can find why it could display 24.000192fps, but not why it should show 24.000384fps)
VLC is the only one that ever comes up with this number, I'm not aware of any existing standard, even less an existing consumer-standard using 24.000384fps, so it's for sure a bug.