Thanks for sharing.  We are having the same problem.  It occurred just recently when QB would not send an email until I ran an update.  After the update the email graphic looks terrible.  We use the desk top installation, and we use Outlook to view our emails.  Both the estimate and invoice have red squares around the text.  The interesting thing is when we went to the native mailbox on the web, and viewed the email it is fine.  I suspect something is not working between QB and Microsoft Outlook.  IN the meantime, our work around is not using QuickBooks email as well.  We have found the most software companies support is minimal.  Good luck.