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I've been racking my brain over this. Youtube works just fine - but Amazon Instant Video goes through its loading animation then just sits there and doesn't play any video. I can still see all the controls pause/skip forward, etc except where the video would normally play. I also followed the instructions here: How to watch videos in Amazon Prime Instant Video?
However, I had no luck. Thanks for any help/sage advice anyone can lend.
Also, I am running 64 bit Ubuntu 13.04, 4Gb ram, intel i3 1.80ghz, Intel ivybridge movile GPU