I sent my fleet to engage the enemy. I enter the combat screen to watch it resolve. Except the screen did not come up. I could hear the shooting of weapons, but the screen never came. I was looking at the galaxy screen, where my view was before attempting to engage an enemy fleet. After the battle sounds stopped I assumed it was over. The galaxy screen remained the same, I was unable to select anything or click on buttons. I tried pressing some keyboard keys, nothing happened. I had to start the task manager and end GalCivIII. There wasn't a crash dump file in regards to this. I reloaded the game and attempted to make the same moves and engage the same fleet from the same spot. Everything worked as it should in my attempt to recreate.

Dxdiag, debug:

https://dl.dropboxusercontent.com/u/8971392/SwitchtoCombatBug.zip