[thismat]

To add to this: The reason the text-indent trick is used was normally for header replacement, navigation replacement, et cetera, and was a method of providing strong naming that didn't clutter markup and fed screen readers or CSS disabled browsers.

Also to expand on it a little more, I use(ed) this trick a lot, and I've never had the image shifted off the page. I'd be interested to see the HTML that actually broke.