When i did this i couldnt get the thigh bone to rotate in its position after linking it when i grabbed it and pulled like with the other bones. So i ended up locking its position in the armature/transform locks (locking location x,y & z) It seem to do the trick. But not sure what the problem could have been and if this will cause any problems later on...
Hope im making sense in my explenation :/
If that's the case, I'm not sure why locking location transforms would in effect "unlock" rotation transforms.