When you create iframe apps there is some nice code that Facebook provides so that the iframe itself can automatically resize to fit the content without leaving ugly scrollbars. The problem is when you link from the bottom of a long page to a short page you are not taken to the top of that short page, so sometimes all you see if a blank white canvas until you manually scroll up.

I recently worked on a Flash based Facebook application, so of course I needed to use the Facebook multi-friend-selector invite widget. The Facebook javascript SDK makes it fairly easy to launch the request dialog. You have to specify a url for the form action, and by default you are redirected to that url after the invite is sent. This is [...]