Question: It seems that when creating a Send button, Facebook will not let me send a link to the current iFrame tab / app. The link always gets reduced to just the Facebook page.

For example, I want to create a Send button using the following href:
<http://www.facebook.com/pages/MyPage/pageid/?sk=app_my_app_id&app_data=My_app_data>

But in the send button, the link gets reduced to:
<http://www.facebook.com/pages/MyPage/pageid>

Any ideas on how to get straight to the correct tab and include the app\_data?

Answer: 
Take a look here: <https://www.facebook.com/note.php?note_id=10150231557835844> CTRL+F Some Limitations of the Send Button
I do not completely understand your question but in facebook apps I use javascript to redirect the whole browser instead of just the iframe, use this:

```
<script>window.location.href="your url"</script>

```

return this as the body when you want to do a redirect.