My LHBS said that some growlers have too thin of glass at the top and that the pressure of carbing could break them. That being said, they did have some other growlers that were MUCH thicker at the top and they said that those would probably work. Needless to say, we did not bottle in any growler. It seems that all the work and waiting that goes into beer making isn't worth the risk (at least for us) of losing our beer due to trying to skip out on a few bottles.
On Tap: Heavenly Scourge Black IPA and Beecave Heffe
Next: Thunderstruck Pumpkin Ale and Pliny the Elder Clone