OSX 10.5.3

Since upgrading:

• Time Machine no longer works (it hangs when “preparing backup”)
• Mail.app crashes so much that it is now totally useless
• The Mac hangs when trying to shut down, so I have to power off by holding down the power button
• Force Quit doesn’t work

Strangely, these were all problems purported to be fixed by the new update, not introduced by it. Bah. Here’s a quote from the first link:

I’m using Macs for 12 years now and I never experienced anything like this…

What is going on with 10.5? It’s a massive bugfest.