Same here....

I can see one battle, but when I try to look at a second one, it hangs and I have to manually end it in the task manager. I save it at this moment just before the battle, and when I open the savegame I can enjoy that battle after restarting. But then it will hangup on another one.

Really frustrating when you have several battles in one turn, and you want to look at all of them to see how your ships behave (weak/strong points analysis). Really hope this is solved before it goes live

Heard something about it being tied to certain graphic drivers? Have a Geforce GT 750M with 4 Gb RAM myself, and have the latest GeForce driver installed. It seems like it doesn't reset properly after watching that one battle and when recalled upon just hangs.

I don't use the battle viewer anymore because its broken, keeps locking up so in order to play the game I just use the auto resolve button

Wow...that is odd....

Indeed I turned off trails, and have since then viewed 5 battles in a row, without any problems!

No thats the invasion screen bug, this is the battle viewer bug where it freezes the game forcing you to crash it 

Black screen when attempting to view battle. I then have to use Task Manager to kill it.

I usually just use the quick resolve to avoid the crash but sometimes I want to watch the battle and then it locks up....