[jdev] Problems with status notifications

[Jan Hanseth]

Hi all,

I'm developing a group chat/whiteboard client using the XIFF
libraries, using jabberd 1.4.3 + mu-conference on the backend.  I'd
like to add a status notification when a connected user begins typing
or drawing, so that the user's name in the roster list changes to
something like:

janet (drawing)

And I'm having some problems with this.

I've pondered doing this two ways:  one in which I send a <message>
stanza that has a jabber:x:event attached to it.  Something like:

<message to="room at conference.localhost" from="janet at localhost">
    <x xmlns="jabber:x:event">
        <composing/>
    </x>
</message>

The other way I've pondered doing it is with <presence> notifications:

<presence to="room at conference.localhost" from "janet at localhost">
    <status>drawing</status>
</presence>

Currently I'm trying to do it the second way.

Both ways seem to work; however, both ways will disconnect users. 
>From the jabberd logs, it appeared that users were running up against
karma limits, so I changed the karma setting on the server so that
<dec> is 0.  Still nothing.  The only thing I know for sure is that
when I'm testing the client, and I'm disconnected, I get this in my
output:

<stream:error>Invalid XML</stream:error>

Now, as far as I can tell from my debug output, there's nothing wrong
with the XML generated by the XIFF libraries.  The problem seems to
manifest most reliably when I click very rapidly on the whiteboard
(thus sending a bunch of <presence> notifications across the wire).

Any idea what I might be doing wrong here?  How have other people
gotten these sorts of notifications to work?

Thanks,
Janet