Kmail crashes upon receipt or sending of mail

[Paul Winkler]

One week ago Kmail began to crash upon receipt or sending of mail.  I am 
running debian unstable, with the latest kde obtained via apt-get 
dist-upgrade.  I have tried older versions of kmail with the same 
result, and have tried kernels 2.2.18 as well as 2.4.9 with the same 
result.  The mozilla mail client works ok.

Any suggestions will be appreciated.  Thanks in advance.
Paul Winkler