A while ago, I wrote a post on creating simple patterns with CSS3 gradients. A common pattern I was unable to create was that of a regular, non-rotated checkerboard. However, I noticed today that by giving a different background-position to every triangle in the pattern tile, a checkerboard can be easily created:
View in Gecko or Webkit. Webkit seems to have an odd rendering bug, so it needed a background-size override and it still doesn’t look perfect. Oh well, reported the bug and moved on.