Can't speak very confidently in regards to using rpm commands, as I've been using source based distro's for some time now; however, I would strongly recommend you simply completely removing your current, RH distributed version of Perl. This would be accomplished by executing: rpm -rvh perl I blieve, though you should look at the man for specifics. Your should then download Perl 5.8.0, and run ./configure, make, make install.

The advantage to compiling your own version of Perl is that you are certain to get a completely vanialla version, free from any random RH mod's!

UPDATE: I might also add that if you are updating an rpm package, you generally ( *I believe* ) should force the upgrade. Really, you should compile and install from source; if you can't do that, uninstall ( rpm -r ) the old package; if last but not least you don't want to do any of the previous, rpm -Ufv package.

Hope this helps,
Lacertus

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"There is more in heaven and earth
than is dreamt of in your philosophy"