Thanks for the sample. I can see the problem.

There is a trailer after the JPEG image containing the IPTC information. The trailer starts with a byte sequence including the characters "AXS!", so I did a search on this and discovered that it is indeed a documented protocol for storing information in JPEG images.

I will look into this. I should be able to read this information, but I don't want to slow down ExifTool, and parsing to the end of the JPEG could be time consuming. There may be some tricks I can use though. I'll see. It may take a week or two (it's Christmas so I'm not working too hard.. ), but I should be able to add the ability to read/write both sets of IPTC information. - Phil