That's why I gave up on Firefox 1.x. I used to love it and now I'm using a browser I used to despise (Safari). Go figure. Between them I ran Camino which was Gecko/Mozilla with a more Mac-like look and sensibility.
I've come to rely on a number of Firefox extensions. I've tried to use Chrome, though not Safari, as I move between OSes and want to have the same browser everywhere, if possible. Chrome wasn't really much better with memory consumption and prevented me from doing a lot of things that I wanted to do that were easy with Firefox and extensions.
Have they acknowledged these types of memory issues?
Sort of. They've at least improved [url=about:memory]about:memory[/url]. There's also a
meta-bug about memory issues.