--- gonzui-1.2+cvs20070129.orig/gonzui/config.rb
+++ gonzui-1.2+cvs20070129/gonzui/config.rb
@@ -79,9 +79,13 @@
     def set_user_and_group
       require 'etc'
       u = Etc::getpwuid(Process.uid)
-      g = Etc::getgrgid(Process.gid)
       @user  = u.name
-      @group = g.name
+      begin
+        g = Etc::getgrgid(Process.gid)
+        @group = g.name
+      rescue ArgumentError
+        @group = nil
+      end
     end
 
     def keys