On December 17th, I installed "Security Update 2007-009" (1.0). I am running 10.5.1 Tonight, I checked SU again and was prompted to install the following: "Security Update 2007-009" (1.1) According to this KB article, http://www.apple.com/support/downloads/securityupdate20070091110411universal.html it is intended for 10.4.11 The size of the download was different, too. It wasn't the 27.4 MB update as stated on that article but the same size as the first 1.0 update (35.6 IIRC). Everything seems to be running okay, but I am curious why SU would request me to add that update. Does anyone have any ideas, comments and suggestions? Thank you.