Unable to copy messages to folder

[alpoe]

When I drag and drop a message into a folder it does not show up there. Yet, when I open the target folder properties it says there is one message.

[DanRaisch]

How is the account set up in Thunderbird, as POP or IMAP? Find out using menu path Tools->Account Settings->Server Settings->Server Type at the top right of the dialogue.
Have you confirmed that Thunderbird is set to "Display All" messages rather than only "Unread" or some other selection. CHeck under the View->Folders menu.

[alpoe]

I am using IMAP. View>Folders>All.
This problem seems to occur only when I create a new folder and then try to drag/drop a message in it.

[DanRaisch]

Where are you you creating the new folders? Under Thunderbird's Local Folders or in the IMAP account in Thunderbird?