Larry,

This is an unusual issue. try the following and see if anyone of these options corrects your issue;

1. Under File > Options > Mail options > Editor Options > Advanced > Display Email Content; confirm the setting "Show Picture Placeholder is unchecked. By default this setting is grayed out unless you access this option via an open message.

2. Under File > Options > Trust Center > Trust Center Settings > Attachment Handling > ( first un-check show attachment preview if checked ) then select Attachment and document previewer. Confirm everything in this window is checked.

Hope this helps.