The mailboxes I have set up for storage do not appear in Mail.
The mailboxes I have set up for storage do not appear in Mail, but I can access individual messages with Search.
iMac, Mac OS X (10.6.7), Dark screen on start up
Have you tried this yet?
Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, it will try to repair your Disk Directory while the spinning radian is happening, so let it go.
Oh, & just asking, you are clicking on the little exposure triangle beside Inbox?
