Ok, I see. Then could you please inline it in default.css using data URI scheme? Additional HTTP request is not good especially for such a small image.
Also I used pngcrush and it saved additional couple of bytes:

```bash
$ pngcrush -rem alla meow.png meow2.png
...
$ du -b  meow.png meow2.png 
422	meow.png
268	meow2.png
```

You could take optimized version here: http://dump.bitcheese.net/files/imojaxa/meow2.png