R. Mark Volkmann wrote:
> Quoting Bill Atkins <batkins57 / gmail.com>:
> 
> 
>>Are you using any other libraries aside from Tk?
> 
> 
> No, just Tk.
> 
> The following simple snippet of code demonstrates the problem.  I see the
> problem under Windows XP, but not under Windows 2000.  On both platforms I'm
> using ruby 1.8.2 (2004-11-06) from the Windows one-click installer.
> 
> require 'tk'
> root = TkRoot.new
> button = TkButton.new(root)
> button.command lambda {Tk.exit}
> button.text 'Exit'
> button.pack
> Tk.mainloop
> 

I just tried the following with the latest one click installer for Ruby. 
  I am running Windows XP SP2 and this code run from irb worked fine.