Most OpenPGP mails are displayed empty with the "Read as plain" option set:

It also stays empty, if Display as HTML is selected on dropdown of the conversion note:
The "Display as HTML" doesn't show the formatted Rich/HTML body for S/MIME mails either.

To reproduce:

1. In Options / Trustcenter -> Email Security activate:
   • Read all standard mail in plain text
   • Read all digitally signed mail in plain text
2. Check mails of different combinations of signed/encrypted, openpgp/smime, html/rich/plain (e.g. in ted:INBOX/Mailformate, all have the same body content as the subject, with "rich" shown in green for Richtext format and "html" shown in red for HTML format)

For whatever reason the only exceptions of pgp mails with converted plain text shown are:

• pgp signed unencrypted html attachment
• pgp unsigned encrypted html noattachment