http://bugs.winehq.org/show_bug.cgi?id=7939
------- Additional Comments From stefandoesinger@gmx.at 2007-05-04 05:16 ------- trace:d3d:IWineD3DDeviceImpl_Clear glScissor: 0, 0, 1024, 768
Those look perfectly ok, the clear should be done on the whole screen.
It may be a bug in your driver. The errors you get back from extension detection are strange too. Which card do you have? And please make sure to install the latest drivers.