Recently I've come across an interesting issue when compiling certain 10.6.8 images. I've created a configuration that works just fine when distributed using Casper Imaging (via netboot). However, when the configuration is compiled (either compressed or uncompressed) any unit that has been installed with the compiled image can no longer contact the JSS and shows the following error:

dyld: shared cached file was build against a different libSystem.dylib, ignoring cache

This can be fixed with the following command:
sudo update_dyld_shared_cache -force

Any thoughts on what might be causing this?