I still have all of mine...
Are you still not showing any of them? Are you getting an error message of some sort? Or are they simply missing when you click on "My Favorites" from the library page?
Let use know if you are still having troubles with them!
On a positive note, you can now download your favorites in the form of a zip file, all at one time. Close to the top after you've clicked on your favorites, you will see a button for "download". Clicking on that will zip the file for you to download. The more you have in your favorites, of course the longer they will take to download. A way cool new feature for those wanting to download pictures from the library!