The current Facebook app for Windows Phone does not work properly.

For example, if you tap on any item for details, when you press the Back key the page is refreshed and the user is taken to the top of the page every time. This can very frustrating, especially when you are attempting to get caught up on posts and events that are many hours old. 

Facebook is the number 1 app that all mobile phone users and should be in a fully workable condition that eliminates these problems (or annoyances)