abrt version: 1.1.18
architecture: x86_64
cmdline: python /usr/bin/meld
component: meld
executable: /usr/bin/meld
kernel: 2.6.35.14-96.fc14.x86_64
package: meld-1.5.2-1.fc14
reason: genericpath.py:41:isdir:TypeError: coercing to Unicode: need string or buffer, NoneType found
release: Fedora release 14 (Laughlin)
How to reproduce: I tryed to drop a text file in the meld window  ....
time: 1318243450
uid: 500

backtrace
-----
genericpath.py:41:isdir:TypeError: coercing to Unicode: need string or buffer, NoneType found

Traceback (most recent call last):
  File "/usr/share/meld/meld/meldwindow.py", line 236, in on_widget_drag_data_received
    self.open_paths(paths)
  File "/usr/share/meld/meld/meldwindow.py", line 668, in open_paths
    tab = self.append_diff(paths, auto_compare)
  File "/usr/share/meld/meld/meldwindow.py", line 612, in append_diff
    dirslist = [p for p in paths if os.path.isdir(p)]
  File "/usr/lib64/python2.7/genericpath.py", line 41, in isdir
    st = os.stat(s)
TypeError: coercing to Unicode: need string or buffer, NoneType found

Local variables in innermost frame:
s: None