Wrong conversion of IPTC SpecialInstructions in copyIptcToXmp()
There is a small mistake in the conversion table used by copyIptcToXmp(). The corresponding XMP field of IPTC's "SpecialInstructions" is "photoshop.Instructions", not "photoshop.Instruction".
The attached patch fixes that. It has been created for the Exiv2 trunk, but works for release 0.19 as well.
Note that the spelling of "Xmp.photoshop.Instructions" seems to be correct in all other sources files, i.e.: