@gargron You have a very weird way of using atom:summary as a "spoiler tag" in my opinion. I can sort of see the reasoning for it, but it's wildly out of touch with the original spec, and have _very_ weird effects when users start using it in creative ways (see e.g. @jephjacques joke-stuff) and it doesn't interoperate properly.
Considering its use in the above instances, could you also send the "summary" as part of the content? That is, as it is shown on your web when showing a specific notice?
Neither Mustard nor AndStatus seem to handle it as you do, and neither does any of the GS web clients.