Security Update 2008-07 makes unbootable image?

Has anyone seen this? I just tried to make an image with this order: 10.5.0 DVD iLifeSupport 8.2.1 (shown as 8.3 on website) AirPortUtility 5.3.2 RemoteDesktopClient 3.2.2 QuickTime 7.5.5 iTunes 8.0.1 Mac OS X Compbo 10.5.5 Front Row Update 2.1.6 Java for Mac OS X 10.5 Update 2 Security Update 2008-07 The resulting disk image will not boot. If I remove the Security Update, then it creates a bootable disk image. I listed Front Row, Java, and the Security Update after the 10.5.5 combo because those 3 are not even available until you install 10.5.5. I have a radmind transcript of the unbootable image, and I'll be making a transcript of the working one (without the security update), and I'll be able to post what the differences are when I make it (fsdiff is running now) but I'm just wondering if anyone has seen this or found out what is wrong already.