I have the latest official Radeon driver (not beta) and DirectX8.

With MM2 I have black and yellow triangles in the sky (maybe, those are clouds ). I have heard there are some 7050 or 7020 betas - do they solve such issues?

T-Bird 900@Asus A7V
256Mb Siemens PC-133
30Gb IBM ATA-100
64Mb Radeon VIVO
SB Live! Platinum
Samsung 750p