Two minor probs with named ranges:

(1) In the name field that occurs at the left of the formula toolbar, if
you change the name from e.g. "C7" to "my_value", it defines the name
my_value for C7.  But there's no way of undefining it without bringing up
the Names dialog.  (I tried setting it to blank to get back the C7, and it
actually gave C7 a name of "", which has to be bad..)

(2) selecting C7, then going to the Names dialog, then changing the range
for my_value to C8, then accepting the changes and closing the dialog, does
not refresh the name field on the toolbar, so if you're in C7 or C8, it
still reflects the old value.

(As an aside, wouldn't the Edit menu or even the Format menu be a better
place for the menu option "Name->Define" than the Insert menu, aside from
Excel compatibility?  I always thought it was in a strange place.  And
there's only one option in the Name submenu too, eliminating the need for
the submenu altogether, right?...  It might also be nice to have "Define
Name" in the right-click context menu too, although it's nice that the
context menu is so small currently...)