Alex,
It seems that if a multipart message, missing only the very first part, is not shown when the button 'show messages with missing parts' is pressed. As soon as the first part is received from another server the message is shown. Can you check this?
Ron
Missing message with missing parts
newspro shows multiparts based on the first part, otherwise it would make sense only for yenc encoding with par2 recovery with the first part missing, most probably eventually it will be also possible, i'm working on an arrangement that includes that option (i started the work long before par2, just it is a part of planned changes).