Haven't had a single issue.

I had a ton of issues with FF3 until I exited Google Desktop. There's probably some sort of conflict, not sure which program's fault, but apparently Firefox isn't playing along well with that, some firewalls and a/v programs, and etc. Certain ads are causing blank pages for me as well.

i actually just *fixed* my FF here on my work machine. it was hanging and loading slow. i opened task manager and the load was 350,000k + WHOA

So i dug around, the docs say to start in safemode to rule out add-ons (in windows go to start>run and type firefox -safe-mode ) and sure enough it cut back to 67,000k so it was a plugin.

I disabled the ever so useful pearl crescent screenshot taker and it is running fast now.

Search for Fireshot on Mozilla's Addon site.

after making that post, still testing, and still hanging. I am in safe mode now and running at 324,332k mem usage....ugh

Ever since FF 3.0 mines been at 300,000k mem usage. It's a pain, for sure. I would say I'm turning to IE but I'd be bluffing.

whoa, i guess my work laptop just sucks, im at almost 500,000k on my home pc, but no lag at all, but home pc is a monster :P