Do a
search for subaru and shaved keys. Its a growing problem. I am currently in the process of working with a locksmith on what is nesessary to correct this issue. Its a common problem with Subaru and Nissan. It seems that the tumbler key sets come from the factory working for TWO keys. The one it was set to open with unique, and a master. If you take a blank Subaru/Nissan key and do just a bit of filing on it, it seems to open alot of doors and ingitions.
This is the result of information that was brought to my attention as well as ongoing research into the matter.