Hello,
I’m an amateur game developer from Poland, writing a 3D Graphics Engine and wanting to make my models in Blender. When trying to write a Python script for exporting meshes with armature and animations, I’ve encountered a problem that seems like a bug in Blender, which completely stops me from exporting correct bone head and tail positions - Blender sometimes returns just random numbers instead of correct positions.
Do you know anything about this problem? Can you check that in your Blender? Look at my test script: http://regedit.gamedev.pl/Download/Produkcje/Skrypty/HorribleBlenderArmatureBug.py
I use Blender version 2.44, but I’ve found here: http://www.devmaster.net/forums/archive/index.php/t-3072.html and here: http://blenderartists.org/forum/showthread.php?t=49950&highlight=bone+head+tail that people had the same problem in 2005 and even in 2003 
I just can’t believe noone succesfully exported armature from Blender since that time. There must be some explanation for this bug. I really would like to hear that this is just my mistake
