Hello cpucooler!
It's important to compile clamav frome sources too!
Use actual clamav version 0.96.1
http://www.clamav.net/lang/de//download/sources/and havp 0.92 for building.
Please uninstall clamav debian package first, before compiling new one (and create the clamav group and user, cause the are deleted after purge package)
Code:
sudo apt-get purge clamav
sudo groupadd clamav
sudo useradd clamav -g clamav -s /bin/false
You can create a backup of clamav init file for your start service script later (/etc/init.d/clamav-daemon).
regards