Not sure if you've discussed this one here, but I cam across it as I had a little flake out of FF on my bank site and used the linux Netscape build.
Just thought I'd pass it on.
I think my issue with FF was actually related to an upgraded mplayer plugin, but haven't confirmed it yet.
However, I've been using this browser a bit now and it runs really well as far as resposiveness on Linux. Actually seems more responsive than FF, though it's built on the FF core.
Anyway, just another one to throw into the mix......
Flock.
Take care, all.
Chris