[progress-events] default action suggestion

  Hi Anne, All,

The latest ED of the Progress Events spec says:

[[
http://dev.w3.org/2006/webapi/progress/#suggested-progressevent-types

Throughout the web platform the |error|, |abort|, and |load| event types 
have traditionally not had a default action and did not bubble so it is 
suggested that for consistency all event types using the |ProgressEvent| 
interface do not bubble and are not cancelable.
]]

The rationale for that recommendation seems reasonable so I'm wondering 
if, for interop reasons, this text should be prescriptive, as implied in 
the following; or if this text should be marked as non-normative:

[[
http://lists.w3.org/Archives/Public/public-webapps/2010OctDec/0026.html

* Event types are now suggestions rather than normative. Specifications
will have to make the final call.
]]

-Art Barstow