While attempting to debug a build created using the 3.2 SDK on an iPhone device I receive the message \"A signed resource has been added, modified, or deleted.\".
I had the same problem in Xcode 3.2.1 when I put a + in my app name. Specifically the "product name" in the build settings. It is fine to have a + in the bundle name in your Info.plist. The same probably applies to other punctuation characters.