I do remember having some issues with the Facebook app on my old Iphone 4 but ever since getting the infuse it seems like the Facebook app is a joke. Updates come but are usually just an exchange from one problem to a new one. I often have to click over to the mobile fb page when the app locks up or just works slow. I'm a heavy fb'er so that is why I'm thinking of getting a new phone asap. Maybe a dual core processor would help? I should mention that the app pretty much sucks on wifi too.