Comment 1 for bug 849416

User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.2) Gecko/20040803
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.2) Gecko/20040803

Moz1.7.2 hides text/calendar of multipart/alternative messages (from MS-Exchange
200x) because it does not know how to display them.
"Unknown" or non-displayable types should not be hidden, but should be shown as
attachments.

Reproducible: Always
Steps to Reproduce:
example msg: (bits)

[beginning of msg]
[header]
MIME-Version: 1.0
Content-Type: multipart/alternative;
 boundary="----_=_NextPart_001_01C4995B.04833D80"
Content-class: urn:content-classes:calendarmessage
[header]
This is a multi-part message in MIME format.

------_=_NextPart_001_01C4995B.04833D80
Content-Type: text/plain;
 charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
[plain text content]
------_=_NextPart_001_01C4995B.04833D80
Content-class: urn:content-classes:calendarmessage
Content-Type: text/calendar;
 method=REQUEST;
 name="meeting.ics"
Content-Transfer-Encoding: 8bit
[vcalendar entry]
------_=_NextPart_001_01C4995B.04833D80--
[end of msg]
Actual Results:
"Content-Type: text/calendar;" is completely hidden if some other content is
displayable.

Expected Results:
Fix:
Display as attachment.
(alt fix: see http://bugzilla.mozilla.org/show_bug.cgi?id=130119)

Enhance:
If a text/calendar type is detected, and Calendar(Sunbird) is integrated into
Moz/Tbird, create a button/popup/icon in the window to export the text/calendar
part into Calendar.

Related items: http://bugzilla.mozilla.org/show_bug.cgi?id=130119#c4
and http://bugzilla.mozilla.org/show_bug.cgi?id=142092#c4