using 
www.pagefault.org's howto (thanks for that guys!)
ive installed clamav-0.60-2.i386.rpm and appropriate amavis & all.
everything worked fine, until...
sme has done one of its periodical re-organisations.
(this is the only coincidence i can see)
now mail is not arriving, and Ive tracked it down to when i 
/usr/bin/qmail-queue.amavis 
the error
'Use of uninitialized value in split at /usr/lib/perl5/site_perl/5.6.1/AMAVIS/Notify/Admin.pm line 23.'
appears 
all other recommended test in the howto are ok (eg perl -e 'use AMAVIS::AV::CLAMD')
i could just reinstall but i presume it will fail again after a while:
any help would be appreciated??