Safari is borked!

I did an erase and install of 10.6 this weekend, and then updated my system to 10.6.3. After I had installed 10.6, Safari worked fine. However, after I installed 10.6.3 (and all of the subsequent updates after that), I have noticed that Safari has major problems. Most of the time, it will not load sites on the first go round. I have to enter a site, press enter, and then press enter again for it to load or it will just sit and think about it. Also, sometimes it will partially load a site. By partially I mean there will be parts of graphics missing or something similar, even on the Apple start page. I thought maybe something got screwed up during install, so I did another erase and install just to be sure. Same results, worked fine with 10.6 but nada on 10.6.3. I have tried the suggestions that I've found on this site and others (such as http://discussions.info.apple.com/thread.jspa?messageID=11305890) without success. It really irritates me that I cannot use Safari, as I like it much better than Chrome or FF. Right now I'm using Chrome, which has no problems, because I need to be able to use the internet. I've tried everything I can think of from repair permissions to resetting the PRAM/SMC. I even set up an account on opendns to try and get this fixed. Nothing works. Any information you have would be greatly appreciated.