I encountered a weird problem with the aircraft search.
I had found an image of a Grumman Gulfstream1, N789G on a Google search and wanted to look up other aircraft of the same model. I highlighted and copied the model details from the top of the aircraft profile.
I then pasted the copied data into the quick search field on the home page and clicked Search. The search returned three aircraft -- but the one I used as example, N789G, was not amongst them. Try it yourself. Very strange.