Corrupted bind pose with MD5 meshes with

I implemented an OpenGL MD5 renderer based on the MD5 file description released at

The Doom 3:s Imp’s bind pose is rendered correctly, but when I export my own rigged mesh
from blender using the plugin named in the title, the bind pose is sometimes corrupted. I haven’t been able to pinpoint what causes the corruption, but this happens for some meshes. Are there some special things to pay attention to when rigging etc?