diff -up nmap-5.50/zenmap/zenmapGUI/App.py.bz637403 nmap-5.50/zenmap/zenmapGUI/App.py

--- nmap-5.50/zenmap/zenmapGUI/App.py.bz637403	2011-01-21 01:04:51.000000000 +0100

+++ nmap-5.50/zenmap/zenmapGUI/App.py	2011-02-07 13:01:36.275314680 +0100

@@ -179,7 +179,7 @@ def install_excepthook():

         # produces a warning, but the lack of a display eventually causes a

         # segmentation fault. See http://live.gnome.org/PyGTK/WhatsNew210.

         import warnings

-        warnings.filterwarnings("error", module = "gtk")

+        warnings.filterwarnings("error", module = "gtk", append=True)

         import gtk

         warnings.resetwarnings()