System Information
64bit Linux Mint 16
Linux Kernel 3.11.0
nVidia GTX 650 Ti, driver 319.32

Blender Version
Broken: 2.70 Release Candidate 1
Worked: 2.69.0 r60991

Short description of error
When you import a model into a scene from File->Link, you then "Proxy" the model to an armature so that you can control it. However, if you create a full copy of the current scene, then all proxied models get unparented from their proxies. Simply re-parenting does not work, as they get offset. The workaround is to go into pose mode with the proxy, select all bones, CTRL-C to copy the pose, go into Object mode and delete the proxy, then select the linked model and create a new proxy, and then in pose mode press CTRL-V to paste in the old pose. Needless to say, this is unnecessarily tedious.

Exact steps for others to reproduce the error

1. Import a model (as a group, I'm assuming) via File->Link
2. Create a proxy for the model from its associated armature
3. At the Scene selector at the top of the window, press the + button and select "Full Copy"
4. The armature has been disassociated from its proxy.