ZIm 0.45 Following link to new page makes ALL CONTENT disappear

[Federico Stafforini]

linux / windows
1. In an existing page, a link to a new page
2. Follow the link. All zim conentt disappears until the application is restarted (including previously existing pages). In windows, the following output appears in command prompt window:

ERROR: Failed to load plugin versioncontrol
Traceback (most recent call last):
  File "C:\Program Files\zim\zim\__init__.py", line 369, in load_plugin
    raise AssertionError, 'Dependencies failed'
AssertionError: Dependencies failed
Traceback (most recent call last):
  File "C:\Program Files\zim\zim\gui\__init__.py", line 1760, in do_open_page
    self.pageview.set_page(page)
  File "C:\Program Files\zim\zim\gui\pageview.py", line 2979, in set_page
    tree = template.process_to_parsetree(self.ui.notebook, page)
  File "C:\Program Files\zim\zim\templates.py", line 299, in process_to_parsetree
    lines = self.process(notebook, page)
  File "C:\Program Files\zim\zim\templates.py", line 287, in process
    self.linker.set_path(page) # this is later reset in body() but we need it here for fir
st part of the template
AttributeError: 'NoneType' object has no attribute 'set_path'

** (python.exe:168): CRITICAL **: pygtk_generic_tree_model_iter_children: assertion `paren
t == NULL || parent->stamp == PYGTK_GENERIC_TREE_MODEL(tree_model)->stamp' failed
C:\Program Files\zim\zim\gui\pageindex.py:473: GtkWarning: file gtktreeview.c: line 5928 (
validate_visible_area): assertion `has_child' failed.
There is a disparity between the internal view of the GtkTreeView,
and the GtkTreeModel. This generally means that the model has changed
without letting the view know. Any display from now on is likely to
be incorrect.

  self.set_cursor(treepath)