Originally posted by Amorya
You're lacking a font. It's in something with serifs here.
I wondered if that was the issue. I experimented and narrowed it down to the font "Baskerville". Now it shows up fine.
Some other annoyances...Mail
uses little boxes with round corners to show the number of unread messages in a mailbox and they also show up on email addresses and the Save button for attachments. But the text in those boxes is not vertically centered and just looks very strange. In fact, in the FROM field for an email message, the name and address is slightly cut off at the top.
Also, when you click JUNK MAIL for a message, the item turns to junk, disappears from the list, then reappears for a split second, then disappears again.In System Preferences
every time I launch it, the Classic button takes a little longer to show up in the list. It just looks weird.