Rendering fast is nice, but when are they going to make the rendering look good? Image scaling at non-integer scales in Chrome is atrocious -- either coming out a blurry or aliased mess.

I almost always need to zoom in 20% to 50% because web designers love tiny fonts too much, and setting a minimum font size breaks their fancy layouts. This results in Chrome making a mess of all images on the page.

Thankfully Firefox resamples images so they look good at non-integer scaling factors too.