I'm continuing to have similar graphics glitches as well; using Windows XP Home Edition, ATI Radeon HD3800, and the latest ATI Catalyst 10.6 drivers. Also happens only in Elemental, other games run fine.
With Advanced Lighting turned on, everything appears murky brown with indistinct outlines. With Advanced Lighting turned off, things look better, but then often after opening other screens within the game (portrait, technology etc) strange glitches remain projected over the map. At one point, I got a popup from Windows that the ATI drivers stopped responding and had to close, but the game itself continued running unchanged.
Also, the retro-dragon intro movie and the audio and background graphic that play throughout the Main Menu play in an very choppy & jerky fashion, this seems to get more extreme with each version of the beta.