The crashes on Invasions are the same as for watching battles, if you reach a certain threshhold the game will Crash. For battles you can at least skip the Screen Change, but not for invasions ( that possible in Beta 5 ).
In Beta 5 when you reach a power Level of 3000 your Power jumped to 0, now in Beta 6 it will jump on 4000 and will Trigger the AI to declare war on you
And finally the Ai went from "tough to handle" in Beta 5 on suicidal to utterly useless in Beta 6 the game isnt even challenging. It feels like gifted AI from Beta 5.