[Snowman]

Awesome - that did the trick. I made the amendment, then chose a random book, blanked some columns, including wordcount, then did a force update. It worked as expected.

Incidentally,I do not remember changing any tag. I rarely do; could it be that ffn itself has various versions of Fanfiction, FanFiction, etc in its own db?

What is interesting is that I then selected all book, went to bulk-edit->tag editor, and looked for Fanfiction. I expected to see both versions, but still only the one was in the total list of tags.

So, to summarise - if a tag exists somewhere, and an book update (not just ffdl) attempts to add a tag with a different case, then a partial update will (silently) occur. This is will probably be noticed during individual updates, but is likely to be overlooked during a bulk update.

I have a feeling that I saw something similar in the "backend db testers" thread...

The post in "backend db testers" is #227-230. In this case, a changed case in a tag could cause an update to unrelated books. So similar, but not the same.

best regards

Snowman