tested ready to try another.hd judder present here and there.thinking im wasting my time with this box amiko alien 8900.It doesn't matter which software you try ,spark same problem.so I can say hd judder is not fixed.in fact maybe a good door stop lol.
Spark does not have Judder, if you have their must be a problem!
I'm running the latest Spark version on Alien 2 and its a great picture.
Cheers