I'd roll back. I am sure Cisco is aware of the issue but there hasn't been a new release.Also I hope you made a back up of the config before the update as it has to be restored since the config of the new version is not in a backward compatible forma...
Same issue, but from a device (IP Phone) behind the router trying to establish a VPN tunnel to the mother ship. Has to be software as I rolled back from 1.0.02.16 to 1.0.01.20 and my VPN telephone started working again.
