I’ve been using Apple’s Mail.app as my primary mail client ever since Thunderbird gave up the ghost about 6 months ago. No, I don’t remember what the problem was with Thunderbird.

Lately, and with increasing regularity, messages which I have read get marked unread when I’m off looking in another folder. When this happens, I have to mark them as read multiple times before they stay marked that way.

I’m not sure if this is a problem with the client or with the server, but it happens on two different mail servers, one of which is running Exchange, and the other is running Cyrus imapd, so I tend to lean towards blaming the client.

I’ve been unable to find reference to anyone else having this problem, but it’s pretty hard to know what to search for.

Anyone else seen this?