My Google Shared Stuff page is missing all the stuff I had shared on it! What gives?

It's true that I haven't used the service for some time; mostly due to Google Reader Shared Items feature. I noticed this when I was looking for something that I remember sharing using Google Shared Items, but when I went to the page, it was blank, it said You have no shared stuff!

Lucky for me I also had added my Google Shared Stuff into my FriendFeed, so I found the page I was looking for. But, where is my happy ending, where have all the shared stuff gone...