ICE: specifcation exception signal raised

Hi: I'm compiling a rather large 3rd party application with ifort 13.1.1 20130313 and ifort is failing on several files with the message:

catastrophic error: **Internal compiler error: specification exception signal raised** Please report this error along with the circumstances in which it occurred in a Software Problem Report.  Note: File and line given may not be explicit cause of this error.

Before I dive into the source to create a simplified case, I wanted to know if "specification exception" meant something specific (hah!) that could help me narrow my search.

Thanks,
Allen