[CentOS] glibc error ???

On a centos 4.6 box

rpm -qa | grep glib

glib-1.2.10-15
glibc-2.3.4-2.39
glibc-headers-2.3.4-2.39
glibc-common-2.3.4-2.39
dbus-glib-0.22-12.EL.9
glibc-kernheaders-2.4-9.1.100.EL
glibc-devel-2.3.4-2.39
glib2-2.4.7-1

I am getting this type of error at times on a mail server

*** glibc detected *** free(): invalid pointer: 0xbffa11b8 ***

While I am researching this more, I am wondering if the rpm-qa | grep glib
info above showing different version for kernheaders makes a difference in
any way.

There are lots of search hits out there for this yet I am wondering if I
should be focusing on a certain glib area or in the application providing
the error in the error logs

 - rh