It looks like this bug has reappeared in 1.3.0 as I'm getting exactly the same issue as before.
Here's the output I get
err:ole:CoGetClassObject class {77f10cf0-3db5-4966-b520-b7c54fd35ed6} not registered
err:ole:CoGetClassObject no class object {77f10cf0-3db5-4966-b520-b7c54fd35ed6} could be created for context 0x1
fixme:dwmapi:DwmSetWindowAttribute (0x200a2, 2, 0x33d8dc, 4) stub
fixme:dwmapi:DwmSetWindowAttribute (0x200a2, 3, 0x33d8d8, 4) stub
fixme:dwmapi:DwmSetWindowAttribute (0x200a2, 4, 0x33d8d4, 4) stub
fixme:dwmapi:DwmSetWindowAttribute (0x100b4, 2, 0x33d81c, 4) stub
fixme:dwmapi:DwmSetWindowAttribute (0x100b4, 3, 0x33d818, 4) stub
fixme:dwmapi:DwmSetWindowAttribute (0x100b4, 4, 0x33d814, 4) stub
fixme:dwmapi:DwmSetWindowAttribute (0x100be, 2, 0x33d2e4, 4) stub
fixme:dwmapi:DwmSetWindowAttribute (0x100be, 3, 0x33d2e0, 4) stub
fixme:dwmapi:DwmSetWindowAttribute (0x100be, 4, 0x33d2dc, 4) stub
fixme:winhttp:WinHttpGetIEProxyConfigForCurrentUser returning no proxy used
fixme:dwmapi:DwmSetWindowAttribute (0x100da, 2, 0x33d94c, 4) stub
fixme:dwmapi:DwmSetWindowAttribute (0x100da, 3, 0x33d948, 4) stub
fixme:dwmapi:DwmSetWindowAttribute (0x100da, 4, 0x33d944, 4) stub
fixme:winhttp:WinHttpGetIEProxyConfigForCurrentUser returning no proxy used
fixme:threadpool:RtlQueueWorkItem Flags 0x4 not supported
fixme:threadpool:RtlQueueWorkItem Flags 0x4 not supported
fixme:threadpool:RtlQueueWorkItem Flags 0x4 not supported
Selecting Windows7 for steam makes no difference, it just requested you install an additional package before failing.
I'm running Gentoo~x86_64 in case it's relevant.
Any ideas? I'm going to downgrade wine to see if the fault vanishes.
