I've compiled and run an app on the iPad (Build Configuration is Debug). Then I've quit the app and disconnected the iPad. Then I started the app on the iPad again, and somewhen a crash happened.
In the crashlog, though, are only hex addresses for my app. Can I still symbolicate those? I didn't touch the project inbetween.
Are you running OS X Lion (likely if you're using the latest Xcode)? If so, your ~/Library folder is hidden by default, and this makes the .dSYM folder invisible. Open a Terminal and try
chflags nohidden ~/Library/
and see if this helps. It worked for me.