The thumbs were present at the old site, and I copied the database and uploaded it to the new site. However, I obviously don't know what I'm doing.
New submissions are not generating thumbs either. Do I need to do a re-install rather than just loading the present files and changing the configs? If this info is elsewhere on the site, please point me to it and I can read up on it. It would be great to have a step-by-step process for moving Photopost from one host to another.