[Tkinter/Win32] Message box on app start -> mouse is dead

[Florian Weimer]

This code doesn't work on Windows (X11 is fine, though):

from Tkinter import *
import tkMessageBox
import sys

tk = Tk()
Button(tk, text="Exit", command=sys.exit).pack()
tkMessageBox.showinfo("Test app", "Click on Ok, then on Exit.\n"
                      + "Do you see the problem?")
tk.mainloop()

(The application doesn't respond to mouse clicks after dismissing the
message box.)

Any suggestions?  I think the problem is caused by the call to `showinfo'
before the Tk message loop is entered.  But my startup code needs to
display some information.