So I've been searching the forum, and the interwebs in general for answers to this issue but I can't seem to figure it out. I'm using Lion 10.7.2, and I use Mail. I'll open mail, view a message and then switch Desktop's to do some work. When I switch back I'll be missing a few emails.

Now, if I click my "sent" folder for instance, than back to my inbox the missing messages will always re-appear without fail. I have attached a screenshot showing a pre "sent" box click, and then the messages re-appearing when I go back to my inbox. Has anyone else experienced this glitch? Any fixes? I don't lose anything, it's more of an annoyance.