I'm always unsure if it's a good idea to do a major update, and now w/ ML 10.8.3 I'm not sure if I"ll update just yet. I've read countless horror stories in the past when upgrading to a new OS version. I wonder how far past one's original OS is a good idea? I guess there's no definite answer, just thinking out loud. It's probably best to keep reading the threads for beta testers, but I'm curious how others handle their decision to update the OS or not to. Thoughts?