No answer from initial reporter in 3 months, and it is marked as fixed upstream. I'll mark it as fixed in Ubuntu. Please feel free to re-open it if you still experience this bug. Thanks.
** Changed in: evolution (Ubuntu) Status: Needs Info => Fix Released -- mark-all-as-read doesn't work when some messages are already marked as read https://launchpad.net/malone/bugs/17206 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs