Having trouble with the PCRE syntax

[strike]

Hello,

thank you guys and thanks a bunch for the explanation!

I'll stick to what Maxim suggested, because it will definitively save me
from headaches. But it's good to have the explanation and so to
understand what the problem was as the syntax looks like fundamental
knowledge to me.

Wow, even the creator himself spent some of his very spare time in
writing a reply. :D

Thanks again!

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,182278,182349#msg-182349