Sometimes streams don't get accepted even if they existed when the call was created.
fixed in http://git.collabora.co.uk/?p=user/sjoerd/telepathy-gabble.git;a=shortlog;h=refs/heads/initial-streams-delay patch needs a testcase before comitting though
This should be fixed for the next stable and unstable releases.
Regression test here: http://git.collabora.co.uk/?p=user/daf/telepathy-gabble;a=shortlog;h=refs/heads/initial-streams-delay
Fixed in git.
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