[wingide-users] Ctrl-Shift-Z for 'redo'

I have set gui.keymap to a copy of keymap.normal and edited it to have 
Ctrl-Shift-Z issue 'redo':

# Editing
'Ctrl-Z': 'undo'
'Ctrl-Shift-Z': 'redo'

  But it does not work: Ctrl-Z and Ctrl-Shift-Z trigger 'redo'. If I 
swap these two lines:

'Ctrl-Shift-Z': 'redo'
'Ctrl-Z': 'undo'

then the both of Ctrl-Z and Ctrl-Shift-Z trigger 'undo'.

I am running WingIDE on MacOS X 10.2.6 with the latest Apple X11.

thanks,
-- 
Dr. Luc Bourhis
Chemical Crystallography Laboratory
University of Durham
England