From time to time I get a record in my statistics that says that the user accessed our site with Facebook using ref = rua as a query string - I looked at all the obvious locations, as well as their documentation
http://fbdevwiki.com/wiki/Ref
Nothing seems to show what ref = rua means.
Any ideas?
this is the "Recently Used Applications" block, which is displayed on the user's timeline (an example is attached)
By the way, this is not the official documentation that you contacted, this is a third-party site
