If you have any of your apps as tabs on your profile, they will be removed by Facebook starting November 3rd. To Read More Visit: http://developers.facebook.com/blog/post/415

The good news is that tabs on application pages will not be affected! So get started today implementing tabs on your app fan pages to ensure cross promotion and higher traffic. Follow these easy steps below:

1. Visit the Facebook Developer application
2. Select the app that you wish to add as a tab to another page. Then select “Application Profile Page”
3. Once on the App Profile Page, select “Add To My Page”. Choose the apps that you’d like to add a profile tab to

It’s as easy as that! We recommend you do this for all of your applications and to increase usage, you can even make the default landing page a tab: On your app’s profile page, go to “Edit Application” > “Edit Wall Settings” > Default Landing Tab