Yes, that's my experience too. Haven't found a way to improve matters.
Just check updating with flash player 11. Some improvement is there what i felt. And please dont forget to take backup of 10.1 flash b4 updating
Thanks for the replies. The first thing I did when I got the box was install Flash Player 11. So not sure how it would be with 10.1!! It is still unwatchable with the embedded flash streaming. Wonder how YouTube does it? I am reluctant to believe it is a problem with the box as both YouTube and the embedded flash sites use Flash Player. So why should there be such a marked difference? Still suspect a software firmware issue in how it is handled. I am planning to upgrade to latest U110781_1109050_HW and see if it makes any difference.

because last time i almost bricked my HD satellite receiver whis thios update but whith hours of research i managed to bring it back to life.
I'm really really sorry about the whole complain thing and of course it's not your problem but I feel a bit cheated at the moment because the box is also advertised as an hd 1080p player and I really can;t see how that can happen.... :-(
. It would be great if someone uploads a documented procedure with screen shots. so that it will be useful to all the members.
. Well we will make the sd tools work.Once it worked means it should work again with some trail & error.