At least on a Mac Audacity seems to have issues when it comes to using third party plugins (i.e. AU or VSTs). To pinpoint which type of plugin is responsible for poor Audacity to crash, you can do the following.
I. Locate Audacity Config File
On a Crapple Mac the audacity.cfg file should be located here: /Users/<your-username>/Library/Application Support/audacity
Apple’s 10.6.2 update closes lots of security holes that could be used to compromise systems. Safari, iWork, iLife, Aperture, Final Cut Studio, and some other apps are rumored to be working more reliable after updating.
Apple pwns back
For OSX86 users on netbooks this update is far away from being recommended at the moment. The update now has proved what has been rumored some days ago: Intel Atom support has definitely been removed from the kernel.
Thus rendering Intel Atom based netbooks non working. Netbooks will not boot after updating as the following video by Stellarola shows. It shows the typical behaviour if the CPU is not supported by the kernel, OS X will instantly reset the system.