10.5.7 Combo installs only partially with InstaDMG rev 179

I noticed that Mail.app was crashing in my 10.5.7 images. After some time I realized that the Mail.app was stuck at version 3.4 (928) while the OS and frameworks had been updated to the 10.5.7 versions. Mail.app should be version 3.6 (935) in 10.5.7 I have retried this several times and discovered that the 10.5.6 Combo does update Mail.app to version 3.5 (930.3) from my base image, but the 10.5.7 does not (with InstaDMG). Pulling apart the package I can see that a new Mail.app is indeed included in the Bom but it is omitted when installer processes the package for some reason. I notice that Mail.app and a few others are singled out in the PackageInfo file for some relocation search. Perhaps this is the problem. The same 10.5.7 Combo package works fine when manually installed into a running, booted system. I will try the new chroot version of InstaDMG and see if it solves it. Anyone else stumbled on this? :question: