Something wrong with my rig. All scrunched up and missing faces? I tried to copy and paste an armature onto a saved model in an alternate .blend file, but my model became all messed up: faces missing and what not.

Here's the photo of what it looks like.


It also says Auto-run disabled. I'm not sure what that has to do with the rig itself, but I thought I'd add it.
If you are using Rigify, the addon uses some drivers to control the bones, and drivers use Python expressions to work. Auto run of Python scripts are disabled by default for security reasons, but you can allow blender to auto run scripts by changing your user preferences. To do this press Ctrl+Alt+U, then head over to File and enable Auto Run Python Scripts: