I have had LR set to automatically write changes into XMP for many years. Recently I stacked the image below in Zerene, edited it in LR, then moved it to photoshop to edit it further. I then brought it back into LR as a TIF. The image had a lot of white spots caused by imperfections in the petals, and yesterday I went back to it in LR and did a LOT of spot removal. I then exported the resulting image, which is what is posted below. When I then went to back up the relevant directory, I found that NEITHER the XMP file nor the TIF file had been altered. They still had a two-week-old date stamp. The edits are clearly stored because the exported JPEG shows them. However, it seems to me that the only place these could be stored is in the catalog, even though I have LR set to store edits in sidecar files. Anyone know what's going on? Thanks.