in reply to Which perl do you use?

I personally use 5.8.x, whichever minor version is installed on the server I happen to working on at the time.

However, I do try and write my CPAN modules with 5.005_03 in mind. So, things like:

That's cause I know my modules are currently used in one place that's on 5.005_03 and I still have friends there. :-)

Being right, does not endow the right to be rude; politeness costs nothing.
Being unknowing, is not the same as being stupid.
Expressing a contrary opinion, whether to the individual or the group, is more often a sign of deeper thought than of cantankerous belligerence.
Do not mistake your goals as the only goals; your opinion as the only opinion; your confidence as correctness. Saying you know better is not the same as explaining you know better.