XEP-0100 specifies that gateways to a non-XMPP protocol SHOULD represent non-XMPP users as bare JIDs unless the non-XMPP protocol also has an equivalent of resources. However, the current Gabble codebase assumes that Jingle calls can't be made to (or by) users who've given us a bare-JID-only presence.. http://git.collabora.co.uk/?p=user/smcv/telepathy-gabble-smcv.git;a=shortlog;h=refs/heads/bare-jids
Fixed in master, will be in 0.9.4
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