I went on your thread and followed some of the users suggestions and Safari works so much better!!!
I had a problem where Safari kept crashing after I instaled Snow Leopard. At one point It took over 90 seconds for a new tab to be opened and work without the turning rainbow wheel. It would lag every time; firefox was not as bad but it did run noticeably slower. Even Dashboard and Exposé would lag/hang like crazy.
I find that now everything works faster, safari, firefox and finder.
I did a few things I'm not sure what did the trick exactly.
-I tried disabling the internet plug-ins to see if it changed anything. I don't think this did much. I checked my folder (/Library/Internet Plug-Ins/) and nothing really looked suspiciously out of date except for 'Flip4Mac WMV'
-I got OpenDNS, I don't think this was a solution but it seems like a useful thing to have in the long run
-I also played around with the Render Before Display timer, but that didn't do much either. (
http://guides.macrumors.com/SpeedupSafari)
-I went through all my applications and got rid of a bunch of the ones that weren't necessary and may be clashing with Snow Leopard, especially since a lot of them wouldn't have been updated for the new OS
-Repairing Disk Permissions from Disk Utility did wonders I think. I never thought to do this after I installed Snow Leopard but after it finished everything seems to be running a lot smoother
Everything seems to be a lot quicker now, so hopefully it'll stay this way after a reboot. Good luck with your computer, I think it is a matter of little kinks here and there slowing the computer down overall especially in the web-browsing area. Run Disk Utility and go through your applications and update/put away the ones that are out of date and may clash with Snow Leopard