Hi Jim,

Thanks for pointing this out. I had actually been thinking that we were talking about a timestamp in the metadata, but I see now that it was the system file modification date.

The filesystem information is handled differently from information actually stored in the image:

By default exiftool does nothing special to try to preserve the filesystem attributes when writing, so the System:FileModifyDate will get set to the current time when a file is edited. However, this time may be preserved by using the -P option. Other filesystem attributes (such as icon position, etc) may also change, but if you really need to preserve things these types of things, the -overwrite_original_in_place option may be used for this.

- Phil