Thanks I understand, I only installed the beta drivers in hopes it would return my Win 8 system to it's former Win 7 smooth-perfection days.
The Windows 8 Media Center x2 herky jerky problem happens on the latest and previous official intel drivers too. It has been a problem since the very beginning of Windows 8 installation for me and others.
The problem is confirmed by others on TheGreenButton forum. Windows 7 latest drivers = Great, Windows 8 latest drivers = herky jerky. Please make sure the Intel devs have a chance to replicate the problem. Here is a test clip.
Dropbox - NBC Bay Area News at 11_KNTVDT_2013_08_06_22_58_00.wtv
Open with Media Center in Windows 8. Press the fast forward button once.
Here is a side by side comparison I just made. If you don't notice it right away, watch the bus, cars, train move.
NVidia Quadro 1000M (i7 Laptop on the left) vs Intel HD4000 (i7 desktop on the right)
Intel vs NVidia, Windows 8 Media Center Herky Jerky video x2 fast forward (speed watching) - YouTube
Remember this is at fast forward >>, audio pitch is reduced to sound normal. The left is so smooth it looks natural even though it's x2 speed. The right is herky/jerky, you'll notice it the most while panning or cars moving etc.