diff -u --exclude=tags --exclude='*.pyc' STUFF/patched/PyShell.py ./PyShell.py
--- STUFF/patched/PyShell.py	2005-05-13 13:17:20.406910929 -0400
+++ ./PyShell.py	2005-05-13 13:55:03.295289485 -0400
@@ -339,9 +339,8 @@
         InteractiveInterpreter.__init__(self, locals=locals)
         self.save_warnings_filters = None
         self.restarting = False
-        self.subprocess_arglist = self.build_subprocess_arglist()
 
-    port = 8833
+    default_port = 8833
     rpcclt = None
     rpcpid = None
 
@@ -368,13 +367,10 @@
         return [decorated_exec] + w + ["-c", command, str(self.port)]
 
     def start_subprocess(self):
-        # spawning first avoids passing a listening socket to the subprocess
-        self.spawn_subprocess()
-        #time.sleep(20) # test to simulate GUI not accepting connection
-        addr = (LOCALHOST, self.port)
-        # Idle starts listening for connection on localhost
-        for i in range(3):
-            time.sleep(i)
+        for i in range(10):
+            self.port = self.default_port+i
+            self.subprocess_arglist = self.build_subprocess_arglist()
+            addr = (LOCALHOST, self.port)
             try:
                 self.rpcclt = MyRPCClient(addr)
                 break
@@ -383,6 +379,9 @@
         else:
             self.display_port_binding_error()
             return None
+        # Start subprocess after binding port to avoid race condition of
+        # starting subprocess that will attach to another guis port.
+        self.spawn_subprocess()
         # Accept the connection from the Python execution server
         self.rpcclt.listening_sock.settimeout(10)
         try:
@@ -729,13 +728,13 @@
     def display_port_binding_error(self):
         tkMessageBox.showerror(
             "Port Binding Error",
-            "IDLE can't bind TCP/IP port 8833, which is necessary to "
+            "IDLE can't bind any TCP/IP port in range %d-%d, which is necessary to "
             "communicate with its Python execution server.  Either "
-            "no networking is installed on this computer or another "
-            "process (another IDLE?) is using the port.  Run IDLE with the -n "
+            "no networking is installed on this computer or other "
+            "processes (other IDLEs?) are using all these ports.  Run IDLE with the -n "
             "command line switch to start without a subprocess and refer to "
             "Help/IDLE Help 'Running without a subprocess' for further "
-            "details.",
+            "details."%(self.default_port,self.port),
             master=self.tkconsole.text)
 
     def display_no_subprocess_error(self):