This is just a consumer preview, so do not expect everything to work right of the box.  This morning I got an update for windows 8 and that loaded a few drivers (I expected) and suddenly my keyboard control keys started working.  Also I finally got the Sleep option!  Finally.  So if you having any issues, I recommend you manually go to the update, if it did not happen automatically for you.

Go to -> Control Panel\System and Security\Windows Update and install the updates.  Odds are this will fix your issues.

If this time it does not fix your issue, give it 2 days and check back. It seems like there is an update everyday.

I’m going to live with this in my 4 year old tablet for a few weeks and see how it feels. You can read other windows 8 posts here.