http://bugs.winehq.org/show_bug.cgi?id=15263
--- Comment #11 from Arkadiusz Piekarz piekarzarkadiusz@gmail.com 2008-10-30 04:20:13 --- Ok, I've checked it and it's even better - either you start buying thorugh Steam client and the whole transaction is done within the client, or you start from a Steam webpage and the whole transaction in in the web browser. So I believe soon there will be no problems with buying on Steam :-)