[LocalPCGuy]

Because the app is in an iFrame, you can just use regular linked files and then the back button works as expected.

If you do that though, there are a few other issues - you may have to account for pages that do/don't have the Facebook signed_request post data - i.e. you probably need to store it in a session or cookie (and deal with the relevant IE7 cookie + iFrame issues by settings P3P header if you support IE7. Can't remember offhand if it is a problem in IE8.)

Obviously more complex apps where navigation is handled through AJAX get tricky when you can't access the container frame. Maybe look into history.js (https://github.com/balupton/History.js/) and see if it works in a Facebook app?

[cmer]

History.js looks promising. I'll definitely dig deeper. Using regular A tags does not work, however, hence my question.

I decided not to support IE7 since this is a brand new app. It will be IE8+. I had to deal with the P3P issue in the past and it was a pain. Hopefully IE8 isn't as picky.

Thanks for the help! I now have something to investigate.

[chris_engel]

If some other people have also problems with IE, facebook and session cookies, have a look at this reciep, i wrote. The solution is pretty easy. http://recipes.wearekiss.com/view/platform/problem-solutions...

[cmer]

I had trouble doing just this, mainly because of how IE handles cookies on 304. I used this Gem for a Rails app (~1 year ago): https://rubygems.org/gems/rack-p3p.