To be honest, it matters a lot less now than it used to, apart from the issue brought up by jhourcle.

Modern perls do not care as much any more what you use for line endings on the server the script runs on. Both CRLF (Windows style) and just LF (Unix style) have always worked on Windows, and since 5.004_05 scripts in Windows/DOS text format work on Unix/Linux/etc. Hmm. That's longer than I thought.