Exactly what I said, very concisely, in post #2 - the first reply to this thread.

Airshow

Add this stupid nonstandard IE-only attribute to the iframe tag, and IE will behave more-or-less like the W3 standard suggests:

You need to style the document(s) that appear in the iframe with a black background, rather than the iframe itself.

Yes, you can style the iframe contents as per usual, but it can be difficult to exactly fill the iframe exactly. Any gap between the content and the outside of the iframe get colored white and the iframe ignores any background styles (maybe it ignores styles altogether; I don't know).

What I do know is that adding the allowtransparency="true" attribute to the iframe allows the underlying background to show through, as I mentioned above.

I thought this old thread was dead but it's good to learn about allowtransparency . Could be useful one day.

Airshow

I got sick to death of threads all over the internet that asked the question but never had the answer, so when I found the answer I went around and rejuvenated a bunch of dead threads, including this one.

It's a problem with forums everywhere.

Thanks Zoot, that's very public spirited of you.

Must spin up my "Hot Rats" some time

Airshow