Hey guys I had this problem in 4.1 beta 3 and now the GM version. I am running on an iphone 4. Go to your phone app,Then go to your favorites tab,Then tap the add button,Then go to the search feature in your contacts tab and search for any contact,after that click the contact and try to add them to your favorites list. Does your phone app crash as soon as you try to add a contact to the favorites? Now you must search for the contact and not scroll through. Anyone that is running 4.1 please let me know if you have this problem to,I did submit a bug report but apple said they couldn't find the problem.