http://bugs.winehq.org/show_bug.cgi?id=35119
--- Comment #11 from Matt mattcbro@earthlink.net --- (In reply to comment #10)
Please attach a +wbemprox trace.
Well I haven't been able to reproduce the bug. Moreover I have made no changes to the install or to any of my prefixes. Additionally, as of yesterday both the pristine 32 bit prefix, and my prefix loaded up with MS .dll's and dotnet stuff all are launching steam and authenticating properly.
Maybe steam updated something since the last update? Wine is still at 1.7.8.0-ubuntu-saucy. If the issue recurrs I will run it with the debug flags turned on to see. Perhaps Valve did something at their end which allows steam to authenticate running under wine.