I was running Google Page Speed on some sites and it recommended using a compressed feed.png file in /misc. It's only a 34 byte difference, but I don't see a difference between the current and the compressed version it generated. Then I also ran pngcrush on it using -brute. It found another 3 bytes to remove.
In the grand scheme of efforts like Google Speed, this kind of change is visually the same, but can save a couple bits off of millions of downloads across the internet.
- Current feed icon: 764 bytes
- Google's compressed version: 730 bytes
- pngcrush version: 727 bytes