I'm not real happy about this. Here's the email I got today. My first email basically said that it had worked and now it didn't. The first reply:
I'm very sorry that you're unable to stream videos from your Nexus 7 tablet anymore.
We use Adobe Flash Player to support our videos, last fall Adobe announced that they were no longer supporting Android Devices and some select web browsers. Amazon Instant Video wasn't intended to be compatible with Android devices, though because Adobe Flash was still supported it did allow some customers to use it.
Amazon Instant Video requires the latest Adobe Flash Player to stream videos. Unfortunately, because your tablet is no longer supported by Adobe, it cannot keep up with the new updates.
We know that convenience of being able to watch videos from anywhere is very important to our customers. What's important to our customers is important to us, rest assured that we are constantly looking at options and ways to expand. I'll take your email as feedback and send it to our Amazon Instant Video team for consideration as we plan for the future.
If you have questions about your Prime Membership or would like to know about other viewing options, please check out our website or contact us again.
The second reply:
Thanks for writing to us at Amazon.com.
First of all, I sincerely apologize for any inconvenience caused in this regard.
I've checked our list of compatible devices and found that Amazon Instant Video isn't currently available on Nexus 7 tablet.
However, The issue you reported us needs real-time troubleshooting to be done. I'd suggest you to please contact us by chat or phone so we can try some real-time troubleshooting with you to fix this problem.
Basically, the only Android devices compatible now are the Fires, and they're shifting the blame to Adobe.