mail content disappears
Suddenly the content of all my emails have disappeared. Mail headers appear in the left column along with a few words of the email as usual. When selected the address lines to/from along with the subject but the message content frame is empty. This is universal on three accounts. I have made no changes to the mail preferences. Any help would be appreciated. Thanks
iMac, Mac OS X (10.7.3), 3.2 GHz I3 4GB Ram