Not noticed these flaws then?
1) The inset image on a rotated element has jagged edges. Anti aliasing has failed to occur. This works properly in Firefox 3.6, IE9 PP7, Safari 5 and Opera 11 (all tested on Windows). This affects the latest Chrome 11 canary build as of writing. (Chromium Issue 36,902)
2) The inset image (when hovered) despite having a high resolution is blurry (it looks like the image was scaled down for main display, then the scaled down image scaled up for the CSS transform, instead of rescaling from source). This has been fixed in Chrome 10 I think, definitely by 11. This works properly in Firefox 3.6, IE9 PP7, Safari 5 and Opera 11 (all tested on Windows).
3) The z-ordering is wrong. If you make a few flickr postcards pop up and then go back, things overlap where they should not. This works properly in Firefox 3.6, IE9 PP7 and Opera 11 (all tested on Windows). Safari 5 is a lot better but not perfect (some small text has incorrect z-order but rest is fine). I think it is a web kit issue here.
I even tested the Ubuntu version of Chrome and it made the same mistakes. I must stress I do love Chrome, I pay particular attention to these issues hoping every time canary gets updated that the rendering issues have been resolved.
All I can say is it's a good job I am not employing you to do website testing :P