One of my G4s (a DP 500) is bringing up "Hard Disk Update" in SU. I don't see it on any of my other machines (not Xserve, other models of G4, iMac, or eMac). It says "The Hard Disk Update improves the longevitry of some hard drives." Don't see it on http://www.apple.com/support/downloads/ yet. Anyone else seeing this?