Whenever I start evolution (and that's quite a few times a day thanks to...) I have to unexpand my Archive folder because it has more than a hundred folders into it that I normally don't need to see, and the first time I want to archive an email (move to folder) I have to expand the Archive folder before I can type the folder name for searching... Worse, I have to expand any subfolders of Archive that have subfolders themselves too...

Would be nice to remember the expansion states, but if not, it occurs to me that defaulting to unexpanded for regular mailer view and to expanded for Select Folder dialog makes more sense.