Comment 39 for bug 744808

Confirmed with Firefox 10.0.2, nvidia 295.20, Ubuntu 11.10.

Offending pages include Launchpad bug tracker, due to its 64x22031 sprite sheet
https://bugs.launchpad.net/+icing/rev14914/icon-sprites
and the new Dropbox design, which features a whopping 64x30030 sprite sheet (which performs even worse than the Launchpad one):
https://www2.dropbox.com/static/1331165834/images/sprites/sprites.png

As more and more web applications switch to sprite sheets to reduce page loading latency, new examples are going to become more frequent.