Yes I still have the problem that the output generated by twig_print_outside_roots (that is, the original XML) is generated with line endings as "\r\r\n" rather than the "\r\n" line endings that are conventional for windows.

I would guess that the parser is striping "\n" characters rather than $/, but that print is generating OS specific line endings. Given that *nix uses "\n" line endings it is unsurprising that the sample code produces correct output on a *nix system.

The problem remains, although I now understand why it is there somewhat. I still don't know how to fix it within XML::Twig.