For the record: A trap for the unwary.
Although Unison's behaviour with filename capitalisation is "safe" while
synchronising to/from a FAT32 drive (such as my portable HDD), the error
message it gives for a failure is somewhat misleading:
Failed: Destination updated during synchronization
Which it hadn't.
The underlying problem was that some time in the dim, distant past, I
had succeeded in duplicating a few photo files and directories (on my
ext3 partition) with names differing only in capitalisation, eg:
Pictures/2004/SLR/
Pictures/2004/slr/
The JPGs and directories in question were identical, but Unison got a
bit confused during the copy to the portable HDD.
Deleting these unwanted duplicates has fixed the problem.
Douglas.
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