Jazzchord style corrupts file

1. Create or open a score with chordnames
2. Style > Edit General Style > Chordnames
3. Specify "jazzchords.xml"
4. Press OK
5. File > Save
6. File > Reload

MuseScore gives the following error message and fails to reload the file:

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MuseScore: Read File
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error reading file C:/Program Files/MuseScore 0.9/demos/promenade.mscx at line 23 column 6: error occurred while parsing content

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OK
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The line in question from the .mscx file looks like this:
<>5.12971e-308</>