After an update to 1.43b5 all entries in the "from"-field in the main window have gone, but they still remain in the DB.
A new message is displayed correctly.
See the note in the file CHANGE-LOG:
- Attention! Mails stored in a previous version won't show the from part in the main view
I will write an update script to fix that!!!
I decided to have a separate column "from_name" to store the actual name into. First, his allows the sorting of the from column in the view and second it reduces processing time if the mails are displayed (the name doesn't need to be extracted every time).