Recently I upgraded to two HD5850 in crossfire from a single HD5850. While play BFBC2 with a single card I had few to no problems but found frame rates dropping now and then. With two in crossfire I have no issues with framerates. However, I and finding glitches, areas where there should be a wall or object I get a shiny light or see right through them. I'm wondering if this may have to do with tearing or if it could be a crossfire driver issue. I am running at 1680X1050, using ATI 10.4 and updated my profiles. I have tried more recent ATI drivers but these have cause the game to shut down sparatically. Any suggestions?? It is something that I can live with if I have to, I would just rather perfer to fix it if possible. Thanks in advance for any help/suggestions.