1. Make Pan display the list of folders.  If you don't have any folders, 
first create one
2. Choose a folder and perform File > Delete Folder, or right-click and 
choose "Delete Group".  Observe that the folder disappears from the list 
of folders.
3. Quit and restart Pan
4. View folder list.  Observe that the previous deleted folder has 
returned to the list.  Confirm that the folder did not really get deleted 
from $HOME/.pan/messages/folders directory.