[whatwg] [html5] Pre-Last Call Comments

[Kristof Zelechovski]

The validator generates an error for the classid attribute (in line with
what the specification says, I think).  An error, unlike a warning, breaks
any complex process that depends on successful validation of the components.

I think the specification text should be rephrased so that the validator can
issue a warning instead.
For the time being, the only practical workaround for this incompatibility
is to use Internet Explorer magic comments.
IMHO,
Chris