Outlook Web Access (OWA) Red X on new emails

Problem:

Outlook Web Access running on Windows Server 2003 SBS with all current patches

Incoming messages are displayed normally.  If we try to create a new message, the message body is not shown, but a small red X is displayed in the top left of the area where the message body should be.  This also happens if we try to forward or reply to a message.  Everything else is working as it should.

Is something blocking the display of this section of the message body.

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