I also manually upgraded yesterday (bad luck, just a few hours after the update) and just now reverted to the previous kernel. Not sure this was the right thing to do but didn't want to take any chances
My desktop and laptop are both root on ZFS so I dodged this bug. (Actually I saw the press on this before upgrading anyway so I'm holding off until I see a fix released.)
I saw the message yesterday late in the evening, I still had 8 hours before my automated updates ran and I thought the package would be revoked by then. Mistake :/