Word 2003 allows you to assign Alt combinations even though they may be the
accelerator keys for menu items (which it doesn't bother to tell you). In
Word 2007, I imagine that the behavior has changed to (a) still not telling
you the current assignment but (b) not letting you reassign the combination.
In the case of Word 2007, I believe this may be because the shortcuts are
contextual.

--
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
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"John Sandu" John wrote in message
...
After installing the beta, I tried to create a new style and assign to it
a
shortcut key, ALT+S. Enetring the dialog box for Shortcut key, I typed
ALT+S
and the I've seen "[unassigned]". But when I pushed the Assign button, I
received an error like "Word cannot change..." something related to
already
assigned keys.
I don't realize what's happening, because in Word 2003 this action was
working sharp...