I believe the problem has been fixed, though I don't really understand why... yet. I'll have to catch up with a lot of reading before I can really understand.
I took a new approach and attacked my muttrc file rather than the inbox folder. I deleted about half of all lines in it and launched mutt and... Problem gone! So I restored all lines and repeated the elimination process a few times until I zeroed in on one line: set folder="$HOME/Mail/inbox" When that one line is commented out, the problem disappears. Please tell me why if you feel like it. Who knows why I even added it in the first place. Probably copied from some .muttrc file shared and spotted in the wild. Mutt seems to be working again and I'll be reading docs and fine tuning it to my very specific tastes. I'll stick around so I get to read about the subject more often and keep learning. Feel free to add any comments you may feel like. They will be very welcome. Otherwise, thank you very much for all the attention. All the best, -- Luciano ES >>