I downloaded and installed the new beta recently and have noticed everytime I fight a fleet action with the Koranth clan two things happen in this sequence:

Enemy ships are invisible in the combat screen, but damage point are being displayed and when the fleet battle finishes the game crashes. This happens everytime. I have not had a problem until the recent beta and then only with the Koranth clan fleets. I have uninstalled and reinstalled the game to no success. Running the latest Nvidia 8800 GTS drivers on and Intel dual core system.