MusicXML Export Issue

Hi all.
I am using MuseScore V 2.0.1 on Windows Vista.
I have found a minor issue when exporting MusicXML. If I add some chord text to my score for a C7sus4 chord and export to MusicXML (compressed), the XML contains:

      <harmony print-frame="no">
        <root>
          <root-step>C</root-step>
          </root>
        <kind text="7sus4">suspended-fourth</kind>
        <degree text="">
          <degree-value>7</degree-value>
          <degree-alter>0</degree-alter>
          <degree-type>add</degree-type>
          </degree>
        </harmony>

When I import the same MusicXML into MuseScore (same version and operating system) there is an error:
Fatal error: line 99 column 24 Element degree contains unknown attribute text.

Ignoring the error is fine & MuseScore loads the score.

Looking at the MusicXML spec, I don't think the degree tag is allowed to have a text attribute.
When I manually edited the MusicXML to remove the text attribute, it loaded OK.

Thanks
Don.