Nice, but wont save favorites

This is a nice app. However, for me, for some reason it will not save my favorites or save changes made to cards. I only need the top 100 for now, so I need it to work properly. It may be b/c I have the new iPhone 4 (or OS 4). I just wanted people to be aware of this glitch.

Pharm_student about Top 200 Drugs Flashcards