The latest version of PCRE available in the Red Hat Enterprise Linux 6.3 repo is v7.8 and the latest version of PHP available is 5.3.3, compiled against that external PCRE v7.8 library. (PHP normally includes a newer version of PCRE, but RHEL compiles against an external library instead)
However we are running into a bug in PCRE versions prior to v8.10 while trying to upgrade to LimeSurvey 2.00+.
Has anyone tried upgrading PCRE on their RHEL 6 servers? Did you have to compile from source, and did you have any dependency problems?