UPDATE: 2.0.1 update did not go as planned and did not fix the keyboard issue for iOS4. I was having some difficulty testing for all the iPhone/iPod/iPad versions in the wild and a big thanks to the emails/comments for the heads up. I have already uploaded 2.0.2 and was able to properly test it for iOS4. Again, sorry for the inconvenience to all the early iOS4 adopters.
If you update to the latest iOS 4 you will notice that the “DONE” button disappears from the keypad. A fix was submitted to the App store but it was not approved before the OS update was available. In the meantime using the sliders is a temporary fix for the suspension tune. Thanks for understanding and being patient–I apologize for the inconvenience–I will post when Apple approves the update!