I have the sprint curve 8330 with all latest updates and software. I started havin problems after the latest update on the app. I tried everything and it didnt work, I would get the error signs and could not establish connection and etc. Until I saw a post in another thread, so i am trying to spread the solution. You have to change your camera settings, go to options then go down to picture size and change to medium(1027x768) all the pics i took with that setting uploaded with no problem.
I give all credit to Pungee!!