SpamAssassin runs amok after Update

[Coteaux]

I was running ISPConfig 2.1.1 on Suse 10.0 64 bit. Everything was fine: Emails were scanned, Spam was discarded...
Then I did an update to ISPConfig 2.1.2 and now, everytime a mail arrives the system, the spamassassin-process eats all the memory (2GB) and the swap until the kernel kills the process. The server is so laggy in these times that I cannot interfere.
Where can I search for an error? How is this spamassassin-script started?

I did the perfect install for suse with the changes for 64 bit in the compile-file and the changes for the suse-courier-start-scripts from this forum.