Apple released Security Update 2007-009 v1.1 which resolves an issue Safari has with certain web sites. This update replaces the original update. If you installed the original update this will install over it and require a reboot. The update is available through Automatic Update or as a direct download.
I haven’t experienced any actual Safari crashes, just some intermittent connectivity or website problems problems. I had one gray screen of death when Safari was running but that hasn’t returned since, even before this this update. So, it’s hard for me to say this latest update improved anything since the problems were intermittent, but I have visited numerous sites in Safari and it seems OK.