Well, I´m having that kind of problem too. Not only when I save/reload without exiting the game, but in the mid to late games I got crashes out of the blue, when I´m playing a regular turn, without any saving/reload.
So far, I haven´t been able to finish a single game......
I´ve noticed the crashes occours when memory consuption gets close to 5gb (I got 8gb in a 64bit win7)
I have just emailed about 40 crashes reports to support@stardock.com as frogboy instructed.
I don´t think I will be playing again until the game gets more stabe. I can´t give feedback on mid to late stages of the game since the crashes render´s it unplayable.
I hope I have given my contribution to the star of the beta.
I eagerly awaits the next update.
Thanks for the good work stardock team! The pain of WoM is almos forgotten!