I have several apps for the iPhone and would like to make an update so that it will be universal for both. The problem I run into is on Xcode I set base to 3.2 and set OS to 3.1.2 and target family iphone/ipad. Then when I run debug in simulator it just doesn't work. No changes to code made at all and when I run in old xcode it works. Also, all the images and placement of images and buttons is really screwed up. Is there any good tutorial for revamping existing apps to be universal?