The best idea is to ensure that your development environments are identical in configuration to your production server.
Your dev systems might have a few extra debugging tools, a nicer text editor, etc, but you'll run into far fewer issues if you at least keep your Perl installations identical.
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Snippets of code should be wrapped in
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horizontal scrolling (and possible janitor
Want more info? How to link or
or How to display code and escape characters
are good places to start.