I'm running Pegasus Mail Version 4.72.572 on Windows 7 Pro 64 bit.
I have my Pegasus set to do word-completion on the To: line. I very frequently have two recipients whose username has the same beginning, e.g., firstname.lastname@example.org and email@example.com. When I first start typing "jo", Pegasus correctly completes "firstname.lastname@example.org", and I continue by typing a comma. When I then type "jo" again, Pegasus again suggests "email@example.com", which is unlikely to be my second recipient. How often would the sender want to put the same recipient's name twice in the To: line? It would be better if Pegasus could ignore the recipient which I have just typed, and could suggest "firstname.lastname@example.org", the second on its list, instead.