I think using backslashes as path seperators in constant strings is a bigger problem overall; forward slashes work on windows and unix, and you don't have a problem with 
$path = "my\new\directory"; # spot the problem here

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Anyway, as soon as you're chdir()ing, you have to watch out with relative paths, using threads doesn't really matter.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: Best practices - absolute paths? by Joost
in thread Best practices - absolute paths? by Eyck

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