I’d like to use Firefox more. I honestly would.
But when I get stuff like this, I really, really don’t feel like it.

There is not a bold or a strong or a css class tag anywhere in that paragraph.
Firefox has stronger compatibility across the entire web. There are occasional sites that do not display or behave in Safari, and so Firefox is necessary. And, since I use WordPress to blog, and Firefox has better compatibility with rich-text editing and other web 2.0 features, Firefox is handy to have around.
But aesthetics is important. And Firefox isn’t even in that race, Safari’s so far out front.
That story looks fine to me, must be a mac thing 🙂
Try Camino. Same Gecko rendering engine, but built for Macs by Mac people. It’s faster than Firefox too.