Thank you, Andre. Problem turned out to be hardware: a worn out mouse. Problem went away with new mouse. John -----Original Message----- From: Andre Klapper <ak-47 gmx net> Subject: Re: [Evolution] Clicking delete icon on highlighted message sometimes causes following message to be deleted, too Date: Mon, 05 Jun 2017 17:33:34 +0200 On Mon, 2017-06-05 at 10:07 -0400, Dr. John H. Lauterbach wrote:evolution 3.20.5 operating under Ubuntu 16.04 64-bit Intermittent error that has been around for past month or so. If message in message list (inbox, for example) is highlighted, clicking on the DELETE icon (Trash bucket) deletes not only the highlighted message but also the message below. This does not happen if the Delete key is used. Mouse is Logitech M185.Never heard of that, but the "keyboard input vs toolbar button" behavior sounds like https://bugzilla.gnome.org/show_bug.cgi?id=775656 which is fixed in Evolution version 3.22.5. You could ask packagers of your distribution to backport the fix, or upgrade to a more recent version of your distribution which includes Evolution 3.22.5 or newer, or try to find some more recent third-party packages out there (Ubuntu calls that "PPA") for your distribution. andre |