We had a problem today on CentOS release 6.4 when restarting the bind / named service. We had been receiving the error message:
/usr/sbin/named: /usr/lib64/libcrypto.so.10: no version information available (required by /usr/lib64/libdns.so.100)
This problem may have come about from using the CentAlt version of Bind. We are using 40:9.9.4-1.P2.el6 and we had been using openssl-1.0.0-27.el6_4.2.x86_64 while openssl version 1.0.1e-16.el6_5.4 was available in the Updates channel.
yum update openssl
solved the problems and stopped the libcrypto error message.