Well, there's a solution to this. It turns out the Camino team regularly releases nightly builds with the latest Gecko engines, and for some reason their nightlies have always been more stable for me than their finals. Go figure.
Anyway, you can find the latest builds here. Just make sure to backup your ~/Library/Application Support/Camino folder in case anything goes haywire.
*I'm looking at you, Gawker Media.