Referencer reports <class 'xml.parsers.expat.ExpatError'> when quering ISI, second edition

Hi

I set up a new system which I'am using to write my master thesis. Guess what: I got a similar problem as https://answers.launchpad.net/referencer/+question/169030 again... Unfortunately the trick that solved the problem last time, did not work this time. The output of the terminal is slightly different:

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bool Transfer::waitForFlag(volatile bool&):
 Waiting...

(referencer:15889): libgnomevfsmm-WARNING **: gnome-vfsmm Async::Handle::cancel(): This method currently leaks memory.
 waitForFlag completed due to transferfail
PyObject* referencer_download(PyObject*, PyObject*):
 got 0 characters

virtual bool PythonPlugin::doAction(Glib::ustring, std::vector<Document*>):
 PythonPlugin::doAction: NULL return value
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As you can see the "void Transfer...." does not show up. Yet the rest of the errormessage and the behaviour of referencer remains exactly the same.

Thanks in advance for your help.
Stefan