E-mails in mail go blank? Doesnt even show to/from/subject

[powermark]

I am unsure if it is caused directly by my Leopard update, but basically I get emails from my boss and what i do is move them to specific folders in mail that stores on my mac. I know I have viewed a few of the emails prior to my update and it was fine. Now all the emails that contain embedded images in the email in these folders, it doesnt show the email anymore. If I click on the message it pops open a blank window, no to and from, etc. The email isnt spam and use to display.