http://bugs.winehq.org/show_bug.cgi?id=32518
--- Comment #3 from Nikolay Sivov bunglehead@gmail.com 2012-12-23 02:13:59 CST --- Created attachment 42911 --> http://bugs.winehq.org/attachment.cgi?id=42911 patch
The problem is that script's calling methods from readystate event callback and bind status callback data is not assigned to request yet. This patch attaches callback data on completion and fixes it for me, please confirm.