Windows Live Mail – all new mail displays blank on message list window

Have been using WLM (2009 version) for some time without issue. A few days ago, all new mail began to appear in the message window blank - no "subject" and no "from" info.  A line appears for each new message but no info is displayed - just the envelope icon at the left of the line and a time stamp on the right side of the line. The time stamp is always the moment the message was downloaded to the computer. When I hover over each message line, the popup window shows no subject and the file size is 0KB.  All mail displays properly in WebMail and on my phone. Just to try something, I "uninstalled" WLM 2009 and installed the latest Windows Essentials package including WLM 2012 - no change.  All mail received and saved to folder prior to this issue still displays properly.  Any thoughts?