10.5.7: Automatic Software Update Feature No Longer Works

Question

Ever since I installed 10.5.7 the automatic Software Update feature no longer works. (Manual updates work fine.) For example, here's what happened today with Safari 4.0.2:
1. After powering up I got the Software Update icon on the Dock.
2. I clicked it and it said I had updates that would require a reboot and it asked the usual stuff. (It didn't say what would update.)
3. I clicked to reboot now and it asked for my password and rebooted.
4. My MacBook rebooted but nothing had been updated.
So, I went to the Apple menu to check for updates and it said I had Safari 4.0.2 ready to be installed. This time, it worked. Unfortunately, I have to do this two-step process on every update that requires a reboot. I could turn off the automatic updates and just do everything manually but I prefer the automatic way. (I had it before, too.)
Thanks in adavance,
Brian

Answer 1

Jeffery,
Thank you for your quick response!
{quote:title=Jeffrey Lee wrote:}
How often do you have SU to check for updates? And do you have "Download important updates automatically" checked as well?{quote}
I have check for updates weekly and download important updates automatically enabled.
{quote}I'm thinking that the first time you approved the update, that it could have been for something that was already downloaded in the background, and just waiting for you to OK the install.
Then when you rebooted, and did the manual check, it found that the Safari update was available as well.{quote}
Interesting. I hadn't thought about that. ☺
{quote}There could be a host of other issues... but check the "installed updates" in the SU preferences, and see what, if anything, was installed right before the last Safari update... note the date and times and see if my theory might be correct.{quote}
Here's what it shows for the last month:
{quote}2009-06-11 00:03:05 -0700: Installed "Digital Camera Raw Compatibility Update" (2.6)
2009-06-11 00:03:10 -0700: Installed "iLife Support" (9.0.3)
2009-06-11 00:03:25 -0700: Installed "iDVD Update" (7.0.4)
2009-06-11 00:04:21 -0700: Installed "Safari" (4.0)
2009-06-17 00:03:28 -0700: Installed "Java for Mac OS X 10.5 Update 4" (1.0)
2009-06-17 23:30:01 -0700: Installed "Safari" (4.0.1)
2009-06-24 23:34:18 -0700: Installed "HP Printer Drivers Update" (1.1.1)
2009-07-09 18:38:49 -0700: Installed "Safari" (4.0.2){quote}
Also, I don't think it matters but I did upgrade VLC to 1.0 the previous day.
Thanks,
Brian