Moose, you can take your wife off the hot seat: I really doubt that overfilling the pool had anything to do with the leak!

The post above is helpful, but the starting place is to verify that you have a leak, and not evaporation loss, by doing a bucket test:
http://pool9.net/bucket-leak/. The test will not only verify the leak, but will show you how large the leak is, even if it's raining. (If you have 1" of rain, but lose 1" of water from the pool, your leak is actually 2" for the period of the test!)

This video will show you how to leak test with phenol red: http://youtu.be/Y90c7pYMgPc