diff --git a/twander.py b/twander.py
index 657888b..fb8aa86 100755
--- a/twander.py
+++ b/twander.py
@@ -6,7 +6,7 @@
 # Program Information
 
 PROGNAME = "twander"
-RCSID = "$Id: twander.py,v 2.88 2003/01/31 19:01:05 tundra Exp $"
+RCSID = "$Id: twander.py,v 2.89 2003/01/31 23:08:14 tundra Exp $"
 VERSION = RCSID.split()[2]
 
 # Copyright Information
@@ -1357,7 +1357,7 @@
 
         # Bind function keys to a common handler
         for x in range(len(self.FuncKeys)):
-            self.DirList.bind('<F%d>' % (x+1), lambda event, index=x :FuncKeypress(index))
+            self.DirList.bind('<F%d>' % (x+1), lambda event, index=x :FuncKeypress(event, index))
         
 
         # Give the listbox focus so it gets keystrokes
@@ -2142,8 +2142,18 @@
 # Event Handler: Handler Function Keys
 #####
 
-def FuncKeypress(index):
+def FuncKeypress(event, index):
 
+    # Only simple Function Key presses are accepted
+    # Modification by Ctl, Alt, etc. are ignored.
+    # This means event.state should be 0 after we
+    # mask off the "don't care" bits
+
+    if (event.state & ~DontCareMask):
+        return "break"
+    
+    # Process the keypress
+    
     dir = UI.FuncKeys[index]
     if dir:
         LoadDirList(dir)