Bug: Invisible?

I keep coming across product pages that have the word "Invisible" instead of the section where it shows other members who have the item on one of their lists. Examples:

www.listal.com/viewproduct/tv/52553
www.listal.com/viewproduct/movies/32449
www.listal.com/viewproduct/movies/33437

I think it is just items that lack any available information because I'm the only one with them listed?