If I receive an email, even if I send it to myself using Zimbra HTML emails are not always displayed correctly. Sometimes the email is displayed in plain text, sometimes an attached image is displayed other times is shows a broken link. Switching between conversation and message view might toggle a change between any of these states. There is a real inconsistency in the rendering of HTML emails. If I imap in using Thunderbird the email displays OK including images. The same email viewed in the AJAX client shows a broken link where the image should be. The mouse over preview of the attachment shows the image correctly. Switching to "basic" view and everything is OK. The problem appears to be with the AJAX HTML rendering.