A few JS-XMPP bugs have been fixed recently for Instantbird, I think we want these fixes for Thunderbird 15:
Bio 1568 - JS-XMPP should handle message type="error" stanzas instead of displaying the messages again in the conversation as incoming, r=clokep.
Bio 1609 - <presence type="subscribe"/> stanzas are ignored when the JID is already in the roster, r=clokep.
Bio 1556 - Download the user's vCard before uploading an avatar, r=clokep.
Created attachment 647519 [details] [diff] [review]
[Approval Request Comment]
On beta, we need to land https://hg.mozilla.org/comm-central/rev/17da70a358e2 before this attachment. This changeset had already been approved for Tb15 (aurora at the time) in bug 742793 but never landed on aurora, because of a known regression (fixed by a patch in this attachment).
And there's a forth changeset for comm-beta, as explained in comment 1:
*** Bug 780172 has been marked as a duplicate of this bug. ***