I like enabling only flash content selectively on web-pages to reduce CPU hog. The flashblock plugin for firefox provides this precise feature. All flash content is blocked and you can enable it by clicking on the box. Unfortunately, this does not always work fine. Sometimes, the animation runs just fine, other times you get a gray box. I read about some "fixes" to click inside the animation, then outside, and others along the same lines but nothing worked. For example http://www.mathworks.com/products/demos/shipping/matlab/New-MATLAB-Mathematics-Features-in-R2009a.html does not work for me. I am running Jaunty with most recent updates -- firefox 3.0.11+build2+nobinonly-0ubuntu0.9.04.1, flash 10.0.22.87ubuntu2 and flashblock 1.5.10. I am sure this is not a problem with flash since epiphany (which does not have flashblock) displays content correctly (but does not block flash). I tested the same versions of firefox and flashblock on Windows, but the problem does not occur either. Any help is greatly appreciated!
Thank you for reporting this to Ubuntu. Are you using an amd64 machine?