I created this review to get an answer...
It should not be taken as a real fix.
I noticed that phabricator return corrupted search results for some russian queries (without this patch).
See screenshot:
But I can't reproduce this bug on https://secure.phabricator.com/
This search query causes problems only for my phabricator instance.
More than that, I didn't find any php.ini-settings that can resolve this problem.
It's look like your phabricator instance use /u-modifier by default.
But how is it possible?