Trouble with Smart Albums

I'm trying to create a smart album from within one of my projects. The criteria I'm trying to use is the "Image Location" found in the IPTC data. The image city is "Seattle", but when I try to create the smart album, it comes up empty. No matter what I do, I can't get it to include the images with the city, Seattle. Everything else works properly, including other cities that I've used for smart album creation.

Any thoughts on what could be causing this?