There's still a bug that makes Mozilla basically unusable for those on dual processor machines, but the good news is that the bugzilla bug tracking site shows that there is a patch ready for final test and incorporation into the build cycle -- so it shouldn't be too long before Mozilla works just fine on dual processor machines.
It's not perfect, but it renders pages quiclkly and accurately, and seems quite stable in my usage so far. Visit mozilla.org and download the 0.9.4 build if you want to check it out.

