I'm using apple mail and have "organize by thread" turned on.
When I click on a thread amongs my new unread mail where there are multiple mail messages in the thread, very often after a few seconds, mail "unclick", mail looses the selection, and I can no longer eg. press the right arrow to expand the thread. This only happens when the thread is collapsed. It makes it impossible to read mail by using keyboard shortcuts only.
Has anyone else seen this problem and / or know any workaround?