Just a guess, but could you check the program ids for the vertex/pixel shaders in drawPrimitiveDrawStrided?
ie, prgId in http://source.winehq.org/git/?p=wine.git;a=blob;h=be8c038b273f2bffd4cb76ddc3... and http://source.winehq.org/git/?p=wine.git;a=blob;h=be8c038b273f2bffd4cb76ddc3...