Make sure that you are using at least version 3.8 of the utility. You mentioned
PostScript fonts, but Font/DA Mover only moves bit images. It is possible
that older bit fonts have a problem with the latest Font/DA Mover. These
fonts would be fonts that don't include the FOND Resource.
If that is the case, you should open the suitcase containing these fonts
and then save them to a new suitcase. This will create a FOND resource for
them. Then copy these fonts to the System file.