I installed Unity window manager and love it, except that it is always crashing, When I say crashing, I mean that it is unrecoverable, I can't kill anything even from TTY.

It occurs usually once a day, but twice in the last hour. Here is my question in the Ubuntu forum about the proble. I'm on 64bit Ubuntu with ATI drivers and old software. Have sufficient RAM.

Some crashes tend to be specific application related (mainly Nautilus, Rhythmbox or Firefox), but some are related to (what I think is) Unity or compiz or maybe my ATI driver.

I would like a super-stable desktop environment to use when I can't afford to have crashes. What are some alternative window managers there? Are any preloaded? I see that there are various gnome window managers. Which would be the most stable.

How do I download alternate window managers, and how do I change them to be the default?

How do I turn compiz OFF, and is that recommended?

Finally, is it fair to assume that these kind of Unity(and apps) related errors are likely to be fixed fairly soon (because 12.04 is for long term support).

What timeframe is reasonable to expect more desktop stability on 12.04?

Thanks.

Once again, I love Ubuntu 12.04/unity when it works. I just want to have a realistic expectation about when it will be more stable and whether downgrading will help.