I downloaded 6.1 to try out with EVE Online. It was previously working with 6.01 and now it fails just at the point where it is entering the station. Attempts to bring up the Control Panel under Bottle Management fails because the entire system locks up and the only way to recover is to shut down the system. This happens even with a totally clean install and download of EVE Online.
I am also unable to roll back to 6.01 as it no longer works either.
To add to this - I tested this with a Mac Book Pro and it was able to successfully migrate over to 6.1.