I was looking at the caps code with a view to reducing the debug spam, and was suddenly suspicious that the corner case where the server removes repeated <c/> nodes from <presence/> stanzas was mishandled. Turns out it's handled correctly, albeit almost by accident; this patch adds a test and an explanation of the point at which it works.
Simon r+ed this on IRC. Merged as http://git.collabora.co.uk/?p=telepathy-gabble.git;a=commitdiff;h=b400522dc53c2b6ecd60f7931e08d7410bfa4b35
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