我注册了测试程序。 OTA更新出现，下载，解压缩和重新启动。然后它加载了一个伟大的小"错误" 屏幕，带病寻找Android：/
I enrolled in the beta program. OTA update appeared, downloaded, unpacked and restarted. Then it loaded up a great little "ERROR" screen with a sick looking Android :/
After restart, it booted back up in Marshmallow.
OK, so no big loss, just time. Happy to try again...but I can't find a way to force the OTA to reappear?
Turns out it just took time. By the next morning I had another alert asking me to download and install the beta. Despite having checked for updates and restarted the phone to see if I could trigger it.
My first download failed. I unenrolled (on the same page where you enroll)...waited a few minutes, the re-enrolled and got another download message.
The second download/install worked fine.
Apparently this has been true for others as well.