iPhone Dev: Xcode调试器不会在断点上停止。

I've got Xcode 3.1.2 on OS X 10.5.5. I have an iPhone project that builds fine but the debugger will not hit any of the breakpoints I set. I've tried all the standard fixes that I find on the net:I've got Xcode 3.1.2 on OS X 10.5.5. I have an