Comment 59 for bug 223238

works for me - Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.9) Gecko/2009042113 Ubuntu/9.04 (jaunty) Firefox/3.0.9

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b5pre) Gecko/20090428 Shiretoko/3.5b5pre

I have a nearly identical setup 8600gt, nvidia 180 driver, Compiz-fusion. The given example pages load reasonably fast given their size .5s or so. Similar performance on Windows and other browsers.