tkMessageBox dialog help

[Nathan]

Hi,

I've been testing the standard dialog boxes in tkMessageBox under IDLE.
If I type for example, tkMessageBox.askyesno('test', 'test'), the dialog box 
comes up fine but another window also appears. I'm guessing this is the 
parent window of the message box. If I click on either of the yes/no 
buttons, i get a True/False on the std out and the dialog box closes but the 
parent window remains and seems to hang. This is on WinXP by the way. Is 
this normal behaviour? How do I get the dialog box appearing without the 
parent window or is this not possible?

Thanks,
Nathan.