In a Neowin forum i read this two things :
1 - Open regedit, and navigate to the following key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
In that registry key, create a new DWORD value named StartMenuInit
Edit the new entry and set the value to 3
Close regedit and reboot
2 - if UAC is off, the list will not populate correctly
Check both
http://www.neowin.net/forum/index.php?showtopic=600378&st=30