LibClamAV Warning: Cannot prepare for JIT, because it has already been converted to interpreter

This happens on systems where you installed 0.96.3. Clamav has released a newer version 0.96.4 and in case your repo doesn't have it listed, you can install it using the following commands (designed for CentOS 5 32-bit):

wget http://packages.sw.be/clamav/clamd-0.96.4-1.el5.rf.i386.rpm
wget http://packages.sw.be/clamav/clamav-0.96.4-1.el5.rf.i386.rpm
wget http://packages.sw.be/clamav/clamav-db-0.96.4-1.el5.rf.i386.rpm
yum -y upgrade clamd-0.96.4-1.el5.rf.i386.rpm clamav-0.96.4-1.el5.rf.i386.rpm clamav-db-0.96.4-1.el5.rf.i386.rpm
rm -f clamd-0.96.4-1.el5.rf.i386.rpm clamav-0.96.4-1.el5.rf.i386.rpm clamav-db-0.96.4-1.el5.rf.i386.rpm

If you happen to be running a 64-bit server:

wget http://packages.sw.be/clamav/clamd-0.96.4-1.el5.rf.x86_64.rpm
wget http://packages.sw.be/clamav/clamav-0.96.4-1.el5.rf.x86_64.rpm
wget http://packages.sw.be/clamav/clamav-db-0.96.4-1.el5.rf.x86_64.rpm
yum -y upgrade clamd-0.96.4-1.el5.rf.x86_64.rpm clamav-0.96.4-1.el5.rf.x86_64.rpm clamav-db-0.96.4-1.el5.rf.x86_64.rpm
rm -f clamd-0.96.4-1.el5.rf.x86_64.rpm clamav-0.96.4-1.el5.rf.x86_64.rpm clamav-db-0.96.4-1.el5.rf.x86_64.rpm

Enjoy!

Thanks,
James Hartig