Issue with loading a VO table

The following file:

http://vao.stsci.edu/portal/Mashup/Mashup.asmx/invoke?request=%7B%22service%22%3A%22Mashup.Url.Download%22%2C%22params%22%3A%7B%22url%22%3A%22http%3A%2F%2Fheasarc.gsfc.nasa.gov%2Fvo%2Fcache%2F86.8211987_-51.06651143_0.016666666666666666%2FESO_SSAP.7670.xml%22%2C%22filename%22%3A%22ESO_SSAP.7670.xml%22%2C%22attachment%22%3A%22true%22%7D%7D,%20http://vao.stsci.edu/portal/Mashup/Clients/Portal/DataDiscovery.html?useAV

causes an exception when trying to parse or validate:

    $ volint ESO_SSAP.7670.xml 
    ERROR: NotImplementedError: This datatype must implement a 'parse' method. [astropy.io.vo.converters]
    Traceback (most recent call last):
      File "/Users/tom/Library/Python/2.7/bin/volint", line 5, in <module>
        pkg_resources.run_script('astropy==0.2.dev1548', 'volint')
      File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources.py", line 499, in run_script
        self.require(requires)[0].run_script(script_name, ns)
      File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources.py", line 1239, in run_script
        execfile(script_filename, namespace, namespace)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/EGG-INFO/scripts/volint", line 5, in <module>
        astropy.io.vo.volint.main()
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/volint.py", line 19, in main
        table.validate(args.filename[0])
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/table.py", line 177, in validate
        votable = parse(input, pedantic=False, filename=filename)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/table.py", line 108, in parse
        config=config, pos=(1, 1)).parse(iterator, config)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/tree.py", line 2881, in parse
        iterator, tag, data, config, pos)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/tree.py", line 2812, in _add_resource
        resource.parse(self, iterator, config)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/tree.py", line 2666, in parse
        iterator, tag, data, config, pos)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/tree.py", line 2623, in _add_table
        table.parse(iterator, config)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/tree.py", line 2010, in parse
        iterator, tag, data, config, pos)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/tree.py", line 1944, in _add_param
        param = Param(self._votable, config=config, pos=pos, **data)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/tree.py", line 1293, in __init__
        id=id, config=config, pos=pos, **extra)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/tree.py", line 1012, in __init__
        self._setup(config, pos)
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/tree.py", line 1316, in _setup
        self.value = self._value
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/tree.py", line 1310, in value
        value, self._config, self._pos)[0]
      File "/Users/tom/Library/Python/2.7/lib/python/site-packages/astropy-0.2.dev1548-py2.7-macosx-10.6-x86_64.egg/astropy/io/vo/converters.py", line 89, in parse
        "This datatype must implement a 'parse' method.")
    NotImplementedError: This datatype must implement a 'parse' method.