When adding image table images with the proper file naming convention to the Source folder,
pdc will create a pdt imagetable for it. When you later change/add/remove frames;
pdc will not update them. It's great for pdc's speed that it doesn't re-encode existing assets, but some hashing would need to be added to detect updates to source assets. This caught me twice, costing about half an hour to track down.
Workaround: delete an existing pdx and re-run pdc. Or go into that pdx and specifically delete the pdt.
This might affect other assets as well, did not try audio, video, or other files