OS X slow, laggy after Safari 4.0.5 update

Question

Short: My late 2007 MBP has been working flawless until safari 4.0.5 update.
After, OS X is laggy...
After the update everything seemed fine, but after i've been working for a while, OS X acts laggy.
Applications and such, opens fast, but doing any graphic intensive like, moving windows, open dashboard (not really graphic intensive but...), playing the game Braid, or any Open GL game for that matter is pure torture.
The funny thing is if i change my display resolution from 1440x900 to 1280x800, then back again, everything is back to snappy old OS X that i'm used to for a minute or two, then the laggyness is back again.
This all started after Safari 4.0.5, i've never experienced this before.
I've tried to run a few system maintenance tools like onyx without any success to my problem.
I reinstalled OS X 10.6.2 update - no luck
I Reinstalled my whole system from scratch. Worked fine until.... Safari 4.0.5
Anyone else having the same problem?
My MacMini's working fine, same goes for my buddys MBP unibody first model.

Answer 1

you didn't import your old prefs and bookmarks back?
When Safari launches, it caches your bookmarks and writes them into a new folder. And that lets Spotlight start indexing.
Maybe you have something connected to your system that is causing problems, interference, or router (see notes, Apple mentions a fix for Linksys, why? and are there other router-related issues?)
At least a clean install (I would have done so on a spare hard drive) rules out any 3rd party extensions, plug-ins, and such, yes? Any update to a browser tends to work best if the old cache and sometimes prefs are removed and create a new profile.
I still think a good clone that you can boot from beats a fresh install from scratch any day of the week.
Maybe zero or 7-way write erase the entire drive at some time (best done before using), though even that isn't a guarantee to find, let alone map out, weak sectors. And no, it isn't done automatically by itself or something.
With only one post (now two) it is always hard to know the level of troubleshooting expertise. Restoring from, and having backup clones, should be a standard practice.
# Stability improvements for 3rd-party plug-ins
# Stability improvements for websites with online forms and Scalable Vector Graphics
# Fixes an issue that prevented Safari from changing settings on some Linksys routers
http://support.apple.com/kb/DL877
About the security content of Safari 4.0.5
http://support.apple.com/kb/HT4070
Give me an uninstall programs feature, please! Create a restore point; and, rollback driver updates, and make this a modern OS. Or maybe 10.6.2 isn't ready for prime time. It is sluggish on my quad-core Mac unlike any prior version that ran on it (10.4.6 thru 10.5.8). Maybe it didn't get enough testing, or it was but works best on future update to the system.
I've seen users with trouble with Safari that: can't be duplicated, couldn't be resolved, both Mac and Windows versions. But my bet is something is left out, not mentioned.