rocknbil - 4:13 pm on May 7, 2012 (gmt 0)
You say it tiles. Have you optimized it? Is it something you can reduce to a single pixel high and allow that to tile?
Experimented with .gif, and reduced the .gif palette as much as possible? You can get as little as 1/10 file size out of a .gif as you can with other formats. Seriously, 1/10 the size. You may have to compromise a little in terms of "image quality" but honestly 189 K for a single image is just gigantic.