But seriously, let us try and stick to just one distro for forest machines to keep confusion within control.
Hardy is not far off (less than a month I think), so wait for it to come out and then do a fresh install.
But if you want to get to the bottom of why nautilus is crashing, run nautilus from a terminal and make it crash and see if you get an error message in the terminal, then post it here.
Always disable compiz, in my opinion. It makes it way slower to login, it's buggy, and it has some seereeus user interface regressions (have you actually tried using the alt-tab in compiz, what the hell?) and all that for a totally unnecessary piece of software. I'm totally disappointed with the throw in everything and the kitchen sink approach that they've taken by adopting compiz. Metacity just works, and it does compositing now. Incrementalism is the way.
I've had it with you. If I had an image of a laser gun I would absolutely position it right here in my hand...
Ha! I have a real laser absolutely positioned in my hand!