asterisk users - Mar 2006 - anonymous caller id causes crash

Hi everybody,
this is not directly related to Asterisk, but I'm sure this is the place 
to get an answer:

Even with Asterisk not running, the entire system will crash when a call 
comes in through CAPI. This only happens when the caller does not submit 
his caller-id.

I'm using the following setup:
AMD Athlon 64Bit
Open SUSE 10
AVM FritzCard 2.0 PCI

Outgoing calls and not anonymous calls are working just fine. I'm 
grateful for any tip.

Regards, Lius