Forum OpenACS Q&A: Response to Having troubles with 3.2.5 and pg7.0
(1) I'd update your libxml2 with the newly built RPM.
(2) The file location info is listed in the README-rpm.txt file,
installed at /usr/doc/openacs-3.2.5/README-rpm.txt on your machine.
Another way to find out where an RPM installs files is to list them
with the command
rpm -ql openacs