Facebook Tab App Doesn't work in IE - facebook

I created a Facebook "Tab App" that appears to be working in Chrome, Safari and FireFox but doesn't seem to load at all in IE8 (and older).
Here is the link to the tab on Facebook:
https://www.facebook.com/lapalomaacademy/app_190322544333196
I also uploaded the code to a page outside of Facebook, and IE8 seems to load that page fine (you can also view the source code on this page):
http://lpatucson.org/facebook/nonfans.html
Any ideas what the issue could be?

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The iframe is usually placed in a domain that is different from mine. When a user with an iphone (using safari) lands on this page and clicks one of the link I provide, it's redirected to a blank page.
This does not happen with chrome or firefox, but only with safari and only with iphones. With chrome and firefox the user is redirected to the correct page.
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There is some policy in safari that blocks the redirects? both sites are under ssl?
This is how I render links:
Thank you very much!

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If you copy and paste that into Chrome it works perfectly.
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Is it possible to use a locally hosted application on a page tab application during development?

I want to be able to display my application in an iframe via a page tab on someone's profile, I have a local version of my application running with SSL (although it is a self assigned certificate), on https://localhost:443.
When I set this url as the canvas url for the canvas page it works correctly, but as a page tab nothing is displayed. In fact upon inspecting the html where I believe the iframe should be there isn't even an iframe, and no actual request is being made to my application.
Does facebook make the request to the page tab url from their servers or something?? (as this would obviously mean you couldn't use a local version of your app). Or does it something to do with the markup my app is returning, as people on the net seem to be saying that you cannot return <html>, <body> or <head> tags to a page tab application.
Help. Please.
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Once application is visited (both canvas and page tab) Facebook issuing POST request to your app, but it's still made by the User's browser.
Update:
This seems like a bug on Facebook end, if you'll visit your application page tab while browsing Facebook over HTTPS it'll work, but if you not using "Secure Facebook" the canvas isn't even requested. As a solution for development you can use Facebook over HTTPS or use HTTP version as "Page Tab URL".

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After about 3 hours of searching, trying and investigating, I finally found the solution.
It seemed to be a (simple) caching problem.
What I did is I cleared all website data of Safari.
Then it worked.