Well, I guess I know what it is, but here's what I experienced. Yesterday I noticed the thing about the automatic update to CarbonLib 1.5, so I decided to activate the software update control panel and extension (they had been in their respective "disabled" folders) and hit the updae button. After it downloaded a big file, I restarted and hoped to find CarbonLib updated to 1.5 (and hoped not to find my OS updated to 9.1, which I've heard is ASS from either from Cipher or Marks). Neither one were updated, which I thought was strange. So today I go looking and find a new folder (dated yesterday) in Application Support called Software Update. It contains two items- Apple Software Restore and the Installer Engine. What are these things and where is CarbonLib. I'm wary about installing this- will it update my OS to 9.1? Like I said, I've heard the web updates are rotten. I'm willing to take a chance, maybe, but only if there is an easy way to go back to 9.0.4. I bought a mac because i want an operating system, not a system i have to operate on.