This has occurred twice in a row now, different regions but both times in my tako (sailboat). Basically both times I had a hard system freeze (screen lock, keyboard lock, etc). Sending in reports on both but wanted to complain a little as I didn't have this trouble with the previous version for the three weeks since I started playing.
I scanned the known issues and didn't see anything (the closest was ATI issues).
I'm upgrading my NVidia drivers on the off-chance that fixes the issue. In the event that it does not fix the problem I will be rolling back to the previous version. If I cannot troubleshoot this and figure out the problem before the new version becomes mandatory I'll likely be forced to cancel my account, which is a shame because I have been enjoying myself.
My guess on the graphics drivers are due to the new graphics pipelining. I'll post back an update if drivers fix the problem.
Graphics Card: BFG 7800 GTX OC
Driver: Forceware 81.85