Exiv2

An invalid Exif tag is created when a user comment tag is added to an image. The problem does not occur in non-intrusive write mode. This means, if an existng comment tag is modified, the result is ok. But if a new user comment is added to an image, which doesn't have a comment yet, the result will be an invalid Exif tag, The invalid tag has a type id 0x000e instead of 0x0007.

Additional information:

This problem was introduced in version 0.8, due to an incorrect fix for bug #445.