close dialog window

Hello people,

At http://bugzilla.gnome.org/show_bug.cgi?id=135865
Nickolay V. Shmyrev writes:

I can easily reproduce this bug with current CVS 

1. Create a new DocBook article
2. Place mouse over title and press right button. 
3. Select New Sibling/List (Terms and Definitions)
4. There will be dialog appeared.
5. Close dialog (as window)
6. You'll see a crash.


The window manager that I use[1] does not show
 close dialog window icons
I get only the OK button.

Is there a keyboard shortcut to close a dialog window?
Which windowmanager provides 'close dialog window'?


Cheers
Geert Stappers

[1] AFAIK it is the default Gnome theme.