I've had steam installed for a long time now and have had no problems.
Recently it keeps forgetting my recently played games and only displays a single game (Age of Empires Online) there, where normally it would show several.
I'm talking about the list of games at the top of the menu when you click the notification icon, and the jump list you get when pinning steam to the start menu.
I've played many other games more recently than AoEO. I always shut down steam correctly and haven't noticed anything else at all unusual.
What could be causing this?
Is there some kind of Microsoft conspiracy at play here?