http://bugs.winehq.org/show_bug.cgi?id=36216
--- Comment #17 from Johannes Dewender wine@JonnyJD.net --- Created attachment 48575 --> http://bugs.winehq.org/attachment.cgi?id=48575 patch reverting commit 2005be6dc92c0943ede01525cecad88f8e83c9c7
I can confirm the problem and the fix for current git (704d169; 1.7.19 + 47 commits).
Without the patch I get that error message starting hearthstone (from battle.net app, login there works). Applying the patch (reverting commit 2005be6) lets me play hearthstone fine again. (played a full match)
I attach the patch that can be applied to revert the "offending" commit. (For people not having/using a git checkout)