I have exactly the same problem. =(

try restart game

Restart game? Wouldn't that mean starting over from the beginning?

It should trigger after you exit the game and then re-run the game a few times.

Lordy - I hope so - I'm in the same boat :(

I've exited the game plenty of times throughout my time playing it.

I also had this problem. I think it might be an issue with Steam syncing content. Quitting steam, restarting steam and restarting the game eventually fixed the problem. It was kinda weird because I actually got Piggybank and The Long Lost Dream before I unlocked Wings of Luxary.

The ones I've collected seem to be showing now. What I don't understand is how you can get all of the collectables without the wings.

We've gotten several since I made that post. :) Yay. :)