Double pcre installation, not conflicting?

[Richard G]

My vbulletin has come up with some problem when creating a new thread.
This has to do with pcre. One option is to downgrade pcre.

But can it be versions of pcre are conflicting?

Because Custombuild installs pcre:

/usr/local/bin/pcretest -C
PCRE version 8.21 2011-12-12
Compiled with
UTF-8 support
Unicode properties support
No just-in-time compiler support
Newline sequence is LF
\R matches all Unicode newlines
Internal link size = 2
POSIX malloc threshold = 10
Default match limit = 10000000
Default recursion depth limit = 10000000
Match recursion uses stack

And so does Centos itself:

ame : pcre Relocations: /usr
Version : 6.6 Vendor: CentOS
Release : 6.el5_6.1 Build Date: Thu 31 Mar 2011 02:08:47 AM CEST
Install Date: Wed 20 Apr 2011 01:58:13 AM CEST Build Host: builder10.centos.org
Group : System Environment/Libraries Source RPM: pcre-6.6-6.el5_6.1.src.rpm
Size : 234389 License: BSD
Signature : DSA/SHA1, Fri 01 Apr 2011 05:07:11 PM CEST, Key ID a8a447dce8562897
URL : http://www.pcre.org/
Summary : Perl-compatible regular expression library

Won't this give any problems? Or is it better to uninstall the Centos pcre and put pcre on the "exclude" line of yum.conf?