I think I have localized one of the problems I am having with cataloging my photos with Lightroom: even if you click "automatically write changes into xmp", Lightroom will quit without warning you that changes were not written.
For instance, I took a keyword that had about 1,000 images associated with it and renamed it, then I quit. The sidecar associated with some of the files did not have a recent modification date, indicating that changes were not saved to the file. Restarting Lightroom and hitting save for these photos did save the changes (with a progress bar indicating that the save was taking a while).
I have been going through my own private nightmare where I changed the name of some folders high up in the directory of keywords (names of folders of folders of keywords), and then imported all my photos into a new catalog. What I found is that the photos have come in with the old and new hierarchies, which has been a mess to figure out. I assume that this is because Lightroom didn't write the changes before quitting, leaving me with an inconsistent set of keyword hierarchies on disk.
Is there something I am missing? If this is just a bug (well, feature error), I'll post a suggestion to get it fixed.
Alan