I have two document libraries. I have enabled DFFS on both libraries. On one library on the Misc tab under the Hidden Fields section it lists all the fields on the library so I can pick which ones to hide. On the other library no fields are listed. If I go to the fields tab it shows all the fields so it appears DFFS can read the field list for the library. I have even tried a different browser/incognito mode thinking it was some type of caching thing.
Brian, are you sure that both are LIBRARIES? I just looked at one of my sites, where I am using v220.127.116.11 of DFFS, and when I apply DFFS to a LIBRARY and look at the Hidden Fields section in the MISC tab in the DFFS configuration, no columns are showing.
When I apply DFFS to a CUSTOM LIST and look at the Hidden Fields section in the MISC tab in the DFFS configuration, all the list columns are showing.