Zim 0.60 bug

[tosim]

This is zim 0.60
Python version is sys.version_info(major=2, minor=7, micro=6, releaselevel='final', serial=0)
Gtk version is (2, 24, 23)
Pygtk version is (2, 24, 0)
Platform is posix
Zim revision is:
  branch: pyzim-trunk
  revision: 672 <email address hidden>
  date: 2013-04-30 19:27:20 +0200

======= Traceback =======
  File "/usr/lib/python2.7/dist-packages/zim/gui/widgets.py", line 3012, in do_response
    destroy = self.do_response_ok()
  File "/usr/lib/python2.7/dist-packages/zim/gui/exportdialog.py", line 72, in do_response_ok
    exporter.export_all(dir, callback=lambda p: dialog.pulse(p.name))
  File "/usr/lib/python2.7/dist-packages/zim/exporter.py", line 116, in export_all
    for page in self.notebook.walk():
  File "/usr/lib/python2.7/dist-packages/zim/notebook.py", line 1953, in walk
    for p in self.index.walk(path):
  File "/usr/lib/python2.7/dist-packages/zim/index.py", line 1216, in _walk
    cursor.execute('select * from pages where parent = ? order by sortkey, basename', (path.id,))
InterfaceError: Error binding parameter 0 - probably unsupported type.