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While trying to reproduce a different problem reported by someone one, I was rather surprised to notice that for most of my JPEG files (which *do* have IPTC info, written long ago by ACDSee), the IPTC tab does not even display! It does for some files, and I'm not clear on the difference. But "most" don't; only "some" do. The most recently JPEGs I had generated do show the IPTC tab, but they aren't so recent that they were generated by 2.5, so it's not that.
Also, for files with no IPTC tab, the IPTC area doesn't show under the Custom tab either. There is a heading "IPTC", but nothing under it - not even the field labels. When I bring up the Batch Set Information dialog and try to use the "*" in an IPTC field to display the current contents of that field, it says "The file type does not support iptc".
If I try running my usual Batch Set Information template on one of the files with no IPTC tab to copy db fields to IPTC, I get an error "failed to set one or more metadata values". But then the IPTC tab appears and I *am* able to write to it. And when I look at the file with ExifTool, it does look like the IPTC is there, written to both the IPTC and XMP blocks. An XMP block being created by the Batch Set Information operation even if it was not previously present, which that operation didn't used to normally do - unless I suppose, if there was no IPTC block to write to?
Actually, I just noticed if I do a "Regenerate thumbs and metatdata" for a file that isn't showing an IPTC tab, it gets the IPTC tab back (assuming the file is physically present - doesn't work on my offline images). So I assume this was a database conversion issue. I *did* select the option to convert my thumbs and exif/iptc metadata, and I *did* get my thumbs. Also, if I do a *search* on some particular aspect of the IPTC data, everything shows up that I expect to show up - the JPEG files just lack an IPTC tab. So it appears the import "sort of" worked - ACDSee is able to search on this IPTC data, but not display it.
I'm guessing that the files that *are* displaying IPTC are ones that for whatever reason had been re-cataloged by 2.5. Makes sense, since as I said it was mostly fairly "recent" files - ones in a folder that I'm still adding to.
