I've done a quick read of the CUs released since SP-1 and do not see any specific errors regarding resource pools. There are some errors regarding master project files.

The crash data seems to show a non-service packed release of Project. Can you please double check that SP-1 is installed with Project? File > Help - and click the link for "Additional Version and Copyright Information."

It may be necessary to re-create the pool file to see if that resolves the error. All project files attached to the pool still exist and are stored in their original location? If you open the pool only and choose Resource tab, Resource pool, Share resources - is there any error?