I use 5.6 on RedHat 6.2 (and Win98) for development in my own time at home.

At work we use 5.005_03 on Solaris 2.5.1 (and I can't see that changing anytime soon).

--
<http://www.dave.org.uk>

European Perl Conference - Sept 22/24 2000, ICA, London
<http://www.yapc.org/Europe/>