I just went through my webcomics folder, migrating every Keenspot comic I read to my webcomic "unplugger", which sucks down the page sans ads, spam and other crap and shows me just the comic itself. Why? Because Keen appears to have added some new evil to all their pages that consistently crashes Firefox 1.0.4 and 1.0.5 on Linux. Not only is Keen the single point of failure for comics on the Web, but as far as Linux is concerned, they seem to be trying to effectively DOS themselves.
I've found that threadless.com also seems to reliably crash Firefox on Linux.