You probably have both versions installed. The one installed using the OS's package manager is the one aliased to "perl" without qualification.
You should be able to run the desired version using a qualified name: try perl5.12.3 -v.
You might have it on a different path than the OS's installed version, too.
In reply to Re: installing perl 5.12.3
by John M. Dlugosz
in thread installing perl 5.12.3
by rob171171
| For: | Use: | ||
| & | & | ||
| < | < | ||
| > | > | ||
| [ | [ | ||
| ] | ] |