Now Thunderbird seems to clump messages with the same subject together and there's a graphical ligature binding these together. It would be nice if I could turn this feature off. It's generally more useful if a directory of messages is displayed in reverse date order or whatever sort order I've specified at the moment. The "threading", if I can call it that, defeats my sort order. It might be nice if I could turn the feature on occasionally to review a conversation, but for day to day use I'd like to turn it off. Thank you.