That is even more surprising. The log usually contains XML.
For my purpose I created DXL containing only the ACL data that I needed.
Today I tried pipelining the ACL from a NotesNoteCollection through a NotesDOMParser to make the replica ID in the database element match the target database. This also worked more than once.
If you think it might help, post your DXL here or e-mail it to me, and I will try to import it. My e-mail address is in my profile.