New device unboxed a couple of days ago. Cannot use OTA to upgrade, says current software is up to date even though it is not. Without a current kernel I cannot download tango core, etc. So the device is basically non-functional (other than a plain tablet :-)) out of the box.
Same problem as this question: Cannot update Tango Core - "Package file was not signed correctly"
Factory resets did not fix the problem. Unlike the previous question, waiting 48 hours provided no resolution. Several users on the Google+ developer group are having similar issues with this batch of devices, so this seems to be a common problem
Thanks!