(From #762 (comment))

There is a peculiar case of when the browser reports that it "supports" preserve-3d, but actually doesn't. Reproduces on most linux machines in Google Chrome.

The thing is that it does not render preserve-3d on some hardware.

See this test case:
http://jsfiddle.net/bZ5sE/3/ -- on my machine (see the configuration here: jmpressjs/jmpress.js#133) it says "Looks like we have preserve-3d support - you should see red text below", but the red text itself is not visible.

I do realize that this is likely a bug to be reported to Webkit/Chromium, but it could take ages before it's fixed, and everyone has updated. So a workaround is a good idea.