On my dads rig, using LAN multiplayer, this builds sometimes hangs when in debrief of a multi mission. The screen goes all stripy, like two frames got mixed in some kind of "blinds" effect. If an options screen pop ups, you get a green-blueish background instead of the acutal image. This has already been reported. It happens when you press pause during a mission, for instance. It happened on my Radeon 9800, but NOT on my brothers computer. (GF2, P4 1,2Ghz, 384MB RAM, Windows ME). I also think I saw it happen on my dads rig. (Radoen X800, AMD64 3k+, 1GB DDR, winXP home). Me and my dad ran OGL, my brother D3D and OGL. It happened on OGL nor D3D on my brothers computer.
Also on multi, even during LAN play there is some stutter for some ships. Which is odd, since all object updates were set on LAN, and it's a 100MBit network. Loading times were good here,but these systems shouldn't show any slowdown on any game, so they're useless for checking slowdowns.