Scaling an iframe with webkitTransform in Safari creates white border

Question

I have a simple html page in an iframe that I am trying to scale with an html5 input range slider. it creates a white border inside the iframe, what looks to be a doubling side effect.

It works perfect in chrome(6.0.472.59 mac), but not in safari (5.0.1 mac).

here is a link to live demo - http://dl.dropbox.com/u/1031653/safari-bug.html

Any sort of suggestion on why this may be happening? hardcore hacks are fine if need be.

Answer 1

This appears to be a Safari bug. I would recommend reporting it at https://bugs.webkit.org/