Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Poll EventsArea: what it touches
ImprovementsKind: in v2.1.234,
ImprovementsSection of the release
What
Parsing and writing of <event> markers now rejects attributes that are valid in general but not valid for that particular kind of event, instead of accepting them.
Evidence
invalid poll event attribute
Strings lifted out of the shipped bundle, so the claim above can be checked against them.