What fop2 server version are you using?

Please try with 2.29

http://download.fop2.com/fop2-2.29-centos-i386.tgz
http://download.fop2.com/fop2-2.29-centos-x86_64.tgz

It is in beta, not yet finalized. But has some updates for dealing with utf8 and double encoding.