Setting the variable *default-pathname-defaults* to empty path #P"" turn
out to be distructive to various "Save As" operations, e.g.
 - File menu,
 - Interface Builder Window Editor dialog.

The effect is the same as calling ASK-USER-FOR-...-PATHNAME with :host
equal to "".

;; Error: Subscript given to array function in PC::ASK-USER-FOR-PATHNAME is
          out of bounds

Am I wrong when assigning the path #P"" to *DEFAULT-PATHNAME-DEFAULTS*?

Sincerely,
                 Dmitri Ivanov
                <aha.ru at divanov>