dccifd process stuck (using all available CPU)

Hi,
My setup is

OS X Server 10.3.9
SpamAssassin 3.2.3
( linked with CommunigatePro)
DCC

DCC has been working very well for me. I was using a version of DCC  
about a year old ( sorry I am not sure of the version)

I then updated  ( using  /var/dcc/libexec/updatedcc) to  DCC 1.3.58  
and soon noticed that a 'dccifd' process was using 100% of the CPU  
and would never die ( note CPU time of  2387:52.34)

505  ??  R    2387:52.34 /var/dcc/libexec/dccifd -tCMN,5, -llog - 
wwhiteclnt -Uuserdirs

Things I tried
- rebooting
- updated ( using  /var/dcc/libexec/updatedcc) to the 'latest'  
version 1.3.59
- completely removed dcc and re-installed from scratch
No matter what I do ( apart from disabling DCC checks in  
SpamAssassin), at some point a 'dccifd' will get stuck using 100% CPU  
and never die. It is not 'every' dccifd.

Andrew