Rated 5 out of 5 stars
I do like this addon and have been using it a long time. Unfortunately there seems to be a problem with the Thunderbird Conversations addon (I'm using version 1.1.2 (Gmail conversation view) on Thunder 3.1.7).
After starting Thunderbird DispMUA works fine when changing messages (displaying the correct MUA). But after choosing a message that has a thread associated (that Gmail conversation view displays as a Gmail conversation), DispMUA will always show the same icon for every message regardless of MUA. Hoovering the icon will produce the correct MUA string. Double clicking the icon also, but the icon on the message will not change.
Thank you for the great addon and continuous development.