CCleaner unexpected shutdown

Unexpected shutdown of CCLeaner 3.00.1310 when running "Run Cleaner".

Program running at same time:Spybot Search & Destroy. But I believe it is not related to the crash

Description:

- On XP with two sessions running (I will name them A and B )

Session A is running firefox. Switching (not logoff) to session B, then running CCleaner, we get an alert that we have to close Firefox. After clicking "OK", CCleaner crash.

Did CC place an error file in the directory in which CC was installed ? That file could provide a clue.