The outstanding issues include:
The current thinking is that as of the 2.0 specification, forms will be optional (i.e. they will be formally specified, but not requred for conformance), and tables and math will only be proposed (i.e. they may be discussed in specially labeled parts of the spec, and they may be supported by some implementations, but they are not yet formally specified)
Accept: text/html; level=1And a client can advertise its lack of support for images by specifying level=0.