Hmm... Just noticed that some of my games aren't showing online when I sign into the PS3 app or on the uk.playstation.com account pages.
They still exist on my account when I look on my PS3 however... weird!
I can only assume that because I haven't played them in a while they aren't showing up, or that therer is a limit on the number of games you can have displaying on the account pages/ app and that this is limited to the games most recently played.
Thankfully it does mean that I can't see Street Fighter IV anymore but the likes of Dead Space and Mirrors Edge are sorely missed.
15 hours ago