Strange behaviour after Show/Hide Speedbar in Emacs 22.1

[Angelo Graziosi]

I have observed this behaviour in Emacs 22.1:

Click on Options | Show/Hide | Speedbar : the speedbar is shown.

Then click on Options | Show/Hide | Speedbar : the speedbar is hidden.

Now the strangeness: trying to exiting Emacs by clicking on the 'X'
(close) button of the window (each window has three buttons: minimize,
maximize, close), Emacs does not exit and in the minibuffer:

   Attempt to delete the sole visible or iconified frame

In 'Messages':

   speedbar-handle-delete-frame: Attempt to delete the sole visible or
                                 iconified frame


It look as if the speedbar were still 'live'

Now one can exit from Emacs only using File | Exit Emacs  or C-x C-c.


This behaviour happens on Cygwin and on GNU/Linux Kubuntu Dapper 6.06.


   Angelo.