Cannot update postgresql

I have a Redhat EL 5.4 server.  There is a postgresql update waiting but I can't apply it - have tried everything I can think of.  I can't find any way to get this libpq.so there.

Anyone got any thoughts?  Google shows a number of times of this sort of thing happening but I haven't been able to get any of the suggestions to work.

yum update
Loaded plugins: rhnplugin, security
Skipping security plugin, no data
Setting up Update Process
Resolving Dependencies
Skipping security plugin, no data
--> Running transaction check
--> Processing Dependency: libpq.so.3()(64bit) for package: apr-util
---> Package postgresql-libs.x86_64 0:8.1.18-2.el5_4.1 set to be updated
--> Finished Dependency Resolution
apr-util-1.2.8-1.x86_64 from installed has depsolving problems
  --> Missing Dependency: libpq.so.3()(64bit) is needed by package apr-util-1.2.8-1.x86_64 (installed)
Error: Missing Dependency: libpq.so.3()(64bit) is needed by package apr-util-1.2.8-1.x86_64 (installed)
 You could try using --skip-broken to work around the problem
 You could try running: package-cleanup --problems
                        package-cleanup --dupes
                        rpm -Va --nofiles --nodigest
The program package-cleanup is found in the yum-utils package.


jj

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