I'm not totally sure if this is a problem in gpg-mailgate or in Thunderbird. When an HTML-only mail is recieved, it gets encrypted, and Thunderbird no longer displays it correctly.
- Viewing the message body as 'Plain Text' shows nothing, just a blank window.
- Viewing the message body as 'Original HTML' displays the message's HTML source code.
- Viewing the message body as 'Simple HTML' shows the ascii-armored ciphertext.
I'm not totally sure if this is a problem in gpg-mailgate or in Thunderbird. When an HTML-only mail is recieved, it gets encrypted, and Thunderbird no longer displays it correctly.