http://bugs.winehq.org/show_bug.cgi?id=12701
--- Comment #7 from Igor Tarasov tarasov.igor@gmail.com 2008-10-13 09:34:12 --- Another bug that I have discovered in this control is that it has some problems in case-insensitive search. That is, when native comctl32.dll is used you may enter text in any case you want, it still searches well. But when using wine built-in library, search becomes case-sensitive.
So, this is still a problem in wine-1.1.6.