_fopen$Unix2003
Error Message
Compile-time error related to _fopen$Unix2003.
Solution (OS X)
In my experience, this is related to using a library compiled with the 10.6 SDK on a project that is compiled with the 10.5 SDK.
Recompile the library with the lower SDK or compile the projector with the higher SDK.
Untested Concern
I am not sure if the platform matters (i386 or x64)