Hard to explain… what happened was this: on a Facebook tab, we feature a button that takes the user to our contest application. This button is just a CSS-styled <a>-link, and I used the “require_login=1” attribute, which takes care of having the user authorize the application.
Recently, we had strange bug reports where users encountered endless [...]

Facebook has finally fixed a rather persistent bug with the New SDK migration option and now provides us with a signed_request parameter that is described here. This parameter provides us with all the parameters we need for building tab apps and accessing the OpenGraph API.
However, I spend quite some time until I was able [...]