I'm just saying that it won't correctly categorize either dot-newline or dot-dot-newline, and that's a potential security hole if someone understands that, or at least an annoyance if it doesn't.

See.. .if I wanted to remove all the files in a directory so I could rmdir it, and I used that regex to skip over dot and dot-dot, I'd also be skipping over dot-newline and dot-dot-newline, and then my rmdir would be failing mysteriously. A potential security hole if the presence of that directory permits me access to something I shouldn't have.

-- Randal L. Schwartz, Perl hacker