NSThread gtm_performBlock Error-Collection of common programming errors

I am trying to run the Street View example in the Google Maps SDK for iOS docs and am getting the following error:

-[NSThread gtm_performBlock:]: unrecognized selector sent to instance 0x1d55d1f0. *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSThread gtm_performBlock:]: unrecognized selector sent to instance 0x1d55d1f0'. libc++abi.dylib: terminate called throwing an exception. The strange thing is that I can get Street View to work in some projects and not others. I have tried both the Google 1.4.3 and 1.4.2 Frameworks and still get this error. Any idea what is causing it?