Your question is, but that is by no means obvious for most Perl questions.

In fact I would hazard a guess that the vast majority of "Perl questions" are not about Perl at all, but about a variety of other subjects of only peripheral relevance, for example:

CGI
web server configuration
shell scripting
Unix
Windows
line endings in text files on different operating systems
browsers
databases
SQL
FTP
file permissions
hairdressing
poetry

BTW, no programming language works "exactly" the same under different operating systems, but Perl comes closer than most.

Regards
Helgi Briem