http://bugs.winehq.org/show_bug.cgi?id=18851
--- Comment #2 from Jeff Zaroyko jeffz@jeffz.name 2009-06-09 21:11:06 --- (In reply to comment #1)
And the problem is? Lots of games that can run on dx9 & dx10 trying to do something like that, get an error and successfully revert to dx9.
The application depends on this one, 3DMark Vantage requires Vista, so no it doesn't revert to dx9, since Wine implements the d3dx9_* dlls it seems reasonable that d3dx10_* will be done too.