PG?

When we got the DVD from Hollywood Video their sticker said PG-13, but on the back of the case it said PG. I assumed that Hollywood Video screwed up. While watching the movie I was thinking to myself: 'How did they get a PG when the movie has a moderate amount of language, including one F-word?' I guess the people printed the DVD case wrong; the MPAA website says it's PG-13.

I was just wondering if anyone else noticed the blunder.