Just to let you know that on top of other issue we see on the forums, we are looking into the Facebook issue, and stuterring problem of course...

Your dxdiag might help for the stuterring problem.
When you experience the problem, could you deactivate your audio card and check if this could be linked?

Thanks in advance for your help.

Some cleaning was made, we hope guenuine scores are better reflected now!

1. Show full game AppID store page in demo version.
2. Change channel mapping to 2 channels, disabled check for default audio change every 1 second which may cause audio problems on some audio cards.
3. Fixed a bug that game crashes after updating scores of Highway II and return back to Game Modes Select page.
4. Fixed a bug that game display wrong ranking (always S) in Game Modes Select page.
5. Add Leaderboards for DLC courses in 'Game Mode Total'.
6. Issue regarding uploading Medals on Facebook.
7. Crash in Championship III, Big Eater, and Highway Levels while playing the game and/or when trying to retrieve the Leaderboards Information.

1. Show full game AppID store page in demo version.
2. Change channel mapping to 2 channels, disabled check for default audio change every 1 second which may cause audio problems on some audio cards.
3. Fixed a bug that game crashes after updating scores of Highway II and return back to Game Modes Select page.
4. Fixed a bug that game display wrong ranking (always S) in Game Modes Select page.
5. Add Leaderboards for DLC courses in 'Game Mode Total'.

Regards.