Does the most recent OS X v10.6 update slow down your computer?

When I first upgraded to Snow Leopard, it felt like Christmas: I got disk space back and my Mac seemed faster and more responsive.
But after I installed the latest updates (I believe it was OS X v10.6.2 and a firmware upgrade), things have not been so rosy:
- there is a noticeable delay when I modify the volume via keyboard keys, this used to instantaneous, now it's like a 1 second lag
- switching applications takes longer, balking at the animation of switching between spaces
- apps in Fusion jam up much more frequently
As far as I can tell, my usage patterns haven't changed at all, and I really did start noticing it from my first use of new updates.
Is anyone else experiencing something similar? I'm not too sure how to diagnose and fix this. It's too bad, because I was really enjoying the performance improvements from Snow Leopard, and now the responsiveness benefit seems gone.

perropicante wrote:
When I first upgraded to Snow Leopard, it felt like Christmas: I got disk space back and my Mac seemed faster and more responsive.
But after I installed the latest updates (I believe it was OS X v10.6.2 and a >firmware upgrade), things have not been so rosy:
Here are some fixes for general slowness that have worked for others. Ignore any you already have tried and any you don't want to try. Try the possible fixes in the order you prefer.
1. If you are running iAntivirus, then uninstall it.
2. Try [resetting your PRAM/NVRAM|http://support.apple.com/kb/HT1379?viewlocale=en_US]. If everything isn't fixed, then follow the [steps here including resetting your SMC if necessary|http://support.apple.com/kb/HT1543].
3. Look in User > Library > StartupItems and in System > Library > StartupItems. Move whatever you find in them to the desktop to see if your problem is resolved. You can move whatever you want back one at a time to test which, if any, is your problem.
4. Use [Preferential Treatment|http://www.versiontracker.com/dyn/moreinfo/macosx/22790] to repair your user preferences.
5.
a. Create a new user
b. Test apps to see that they work with no crashing.
c. Drag your data and other needed things (e.g., mail) (not your whole home folder) into their proper places in your new user home folder. Use [this guide|http://discussions.apple.com/message.jspa?messageID=6185507] to know what to drag.
d. Re-enter your app preferences if you are going to keep using the new user.
e. If you want to use the old user name, then delete the old account; recreate it; and move everything back to the original locations.
f. You will need to fix the permissions, app settings, etc.
6. Go back to 10.6. You can do so simply by reinstalling Snow over Snow as in doing an upgrade install.
7. Reinstall .6.1 and .6.2 using [only the combo updater|http://support.apple.com/kb/DL959].

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