I have an invitation with text in the Description field in text and in HTML. When I look at the message structure viewer, I only VCS/ICS Calender type, not the HTML etc. The display does the opposite: It displays the HTML only and does not display the information from the vcard description at all! An indication that the parser has done something wrong can be found in the fact that the rendered email/invitation shows: <font color="#ff0000">Some Federation -- 123 Rue de Somewhere, Paris -- salle Trucmuche</font> (<strike>Some - salle Trucmuche</strike> This was painful because the vcard description contained text that was not in the HTML description. It took me a long time searching and some mutt intervention to find out that the text was there, but not displayed.
Reported as bug 377453.