My Vista experiences to-date have been nothing short of fantastic. However, I did experience a very annoying problem where my Thinkpad T60 would awake from sleep... but only half way. The screen would never come on.
Very annoying as the problem seem random and I could not reproduce it. Well, I was able to track it down to 2 things.
1) I was not using the OEM version of the ATI driver.
In the past I have not ever installed the OEM Video Driver as it was always "behind" the latest ATI or nVidia one. Well as it turns out, there are occasions where the OEM version has custom bug fixes. Installing the Lenovo ATI driver resolved part of the problem.
I still experienced the problem, albeit much less frequently. But when I did I went berserk. There is nothing worse then seeing all these blinky lights saying your pc is awake as well as all the sounds and stuff working. Well I did some research and stumbled upon this KB Article.
2) I installed a hotfix for bluetooth.
What does bluetooth have to do with standby?
SYMPTOMS
When you wake a Windows Vista-based computer from sleep, a Bluetooth device may no longer work correctly. After this problem occurs, the computer may stop responding when you try to put the computer to sleep again. Or, the computer may stop responding when you try to shut down or restart the computer.
CAUSE
This problem may occur on a system that supports selective suspend if the computer goes to sleep shortly after the Bluetooth device's power is cycled.
Sounds familiar... I installed the hotfix and have been running smooth for 2 weeks now. Getting this hotfix is annoying, you have to email support to get it.