> Well, 1.9.2 behaving differently than 1.9.1 and 1.8 is certainly less 
> expected.

yeah.  1.9.1 behaving differently with a different *patch level* is less 
than expected, too.

> Apparently in 1.9 \p{Word} can be used instead of \w to match unicode 
> characters; however I did not find any documentation for this ("word" 
> it's not a unicode character category).

That's odd that there's no standard.  Maybe ruby made this up on their 
own, then?

I think it's mentioned briefly

http://svn.ruby-lang.org/repos/ruby/trunk/doc/re.rdoc

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