See image in the url field. It visibly loads slowly, even after we should have it cached. I don't understand why. See http://stackoverflow.com/questions/10608542/visible-image-buildup-from-top-to-bottom-is-there-a-way-to-show-in-one-stroke for the original thread about this.
Interesting... Same behavior in chrome on my Linux box. Loading off bugzilla's servers is better, but I still see a flash as it loads, and I still see a full network request, in Firefox and Chrome. data:text/html,<img src="https://bugzilla.mozilla.org/attachment.cgi?id=625882"> Doesn't look like anything is being cached, with either URL, in either browser. I'd think that caching was being disabled in the HTTP headers, but sabine-schneider.silbe.org is sending back basically zero headers, so that shouldn't disable our cache.
It's not just that. If you look at the original context for this discussion, there is a copy of this image loaded into one <img> tag and then another <img> tag with the same URI is created. That should just hit the imagelib cache, I'd think. And in that situation Chrome's behavior _is_ apparently different.
Created attachment 625887 [details] A second test image http://en.wikipedia.org/wiki/File:PNG_transparency_demonstration_1.png
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