Tim, > The key point to remember is that a mized installation is not about > loading org sources from two different org versions. The problem is > about compilation of org where some of the source definitions are > already loaded (from existing installation) and result in output which > is a combination of some of the source from the new version mixed with > definitions from the old version.
hah. i think you or others have mentioned this before, but i hadn't understood until now (albeit still vaguely). thanks! cheers, Greg