This has been resolved by fixing the example.
/w3ccvs/WWW/Math/Group/spec/xml/presentation-markup.xml,v
revision: 1.277
On Wed, Sep 30, 2009 at 1:16 PM, Neil Soiffer
<Neils@...> wrote:
The second mpadded example is:
<mrow>
<mi>x</mi>
<mpadded width="+90% width" height="+0.3ex" depth="+0.3ex">
<mi>y</mi>
</mpadded>
<mi>z</mi>
</mrow>
The width value "+90% width" has a space in it. The spec earlier says, "Formally, spaces are not allowed within these values, but implementers may
wish to ignore such spaces to maximize backward compatibility." It should go from the example.