python-webkit webkit.WebHistory.get_uri() does not work

Binary package hint: python-webkit

Hello,
I have problem with the python-webkit package (version: 1.0.2-1ubuntu1).
I tried to use the get_uri method on a WebHistory which is from a webkit.WebView.get_back_forward_list().get_back_list_with_limit(10) and I got the following error:
** (main.py:7275): CRITICAL **: const gchar* webkit_web_history_item_get_uri(WebKitWebHistoryItem*): assertion `item != NULL' failed

Note: In my main.py, I don't have 7000 lines (I only have 300 lines).

I'm supposed to get the uri of the item...