Reverting to system Perl - downgrading

Not how I expected my weekend to go.

My redhat server previously had perl 5.8.0 installed on it. Downloading a mysql utility, it asked for that and I blindly installed it. Broke a whole bunch of things. Now I'm hearing that I should revert back to my "system perl" because there may be further incompatibilities.

Any ideas on how I need to handle this?

What version of perl have you got now? 5.12?

the system perl was 5.8.0 the one I installed last night was 5.12

As far as I know, perl 5.12 is fully compatible with perl 5.8. What exactly broke? Missing modules?