Sometime today. It will take a while for it to get through all the different servers around the world. I only skimmed this but here's a quick review. Note the javascript speed comparison graph, especially IE8 (shorter is better).
I already left firefox since it has crashed more often when it upgraded to version 3. Using chrome instead
LOL! I can't find the counter now but, last I looked was 20 minutes after it was released, it was approaching 2 million upgrades alone and you are going to downgrade?! You'll be missing out on some great things, my friend. Great things this coming year.
I am still using FF version 3.0.11 and will only install the new upgrade when FF itself notifies me about the new update! Regards, RightMan