abrt version: 2.0.3
architecture:   i686
cmdline:        /usr/bin/python /usr/bin/zim
comment:        Not sure how, but this error keeps coming since I use Zim 0.53. This is the stable repo version. I do nothing fancy.
component:      Zim
executable:     /usr/bin/zim
kernel:         2.6.41.4-1.fc15.i686
os_release:     Fedora release 15 (Lovelock)
package:        Zim-0.53-1.fc15
reason:         pageindex.py:590:do_drag_data_received:TypeError: 'NoneType' object is not iterable
time:           Wed Dec 14 16:57:43 2011
uid:            500
username:       mt

backtrace:
:pageindex.py:590:do_drag_data_received:TypeError: 'NoneType' object is not iterable
:
:Traceback (most recent call last):
:  File "/usr/lib/python2.7/site-packages/zim/gui/pageindex.py", line 590, in do_drag_data_received
:    treepath, position = self.get_dest_row_at_pos(x, y)
:TypeError: 'NoneType' object is not iterable
:
:Local variables in innermost frame:
:info: 2
:dragcontext: <gtk.gdk.DragContext object at 0xa978a04 (GdkDragContext at 0xa502e18)>
:selectiondata: <GtkSelectionData at 0xbf80bff4>
:self: <PageTreeView object at 0xa554734 (zim+gui+pageindex+PageTreeView at 0xa5ca1d8)>
:source: <Path: memo:tecoz>
:names: [u'memo:tecoz']
:time: 32779599
:y: 408
:x: 24