in reply to
Any major difference between perl 5.00503 and perl 5.6?
Have a look at perldoc perldelta.
This will show you all changes from version to version.
(No link to the monastery library, because it has only version 5.005)
The same name on every site (unless it is taken already)
A different name for every site
The same name for sites I don't care about, but different names on sites I do care about
Different names for sites I don't care about, but the same name on sites I do care about
The anonymous account
Someone else's username
Root, after hacking into the site
Results (241 votes),