Regex now case-sensitive again?

[Matt Robinson]

Hi all,
 
After upgrading one of our servers from Varnish 2.0.4 to 2.1, it's
behaving as though the regex matching is case-sensitive.  My
understanding was that this had been case-insensitive for a couple of
years now.
 
I notice that the regex engine was changed in 2.1, so could this be the
reason for this behaviour?  Has anyone else seen this?  If so, was it an
intentional change?
 
Thanks for any help,
 
Matt
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