Fix vertical motion in column view.

Reported by Daniel Clemente.

lisp/org-colview.el

@@ -81,8 +81,20 @@ This is the compiled version of the format.")
 (org-defkey org-columns-map "\M-b" 'backward-char)
 (org-defkey org-columns-map "a" 'org-columns-edit-allowed)
 (org-defkey org-columns-map "s" 'org-columns-edit-attributes)
-(org-defkey org-columns-map "\M-f" (lambda () (interactive) (goto-char (1+ (point)))))
-(org-defkey org-columns-map [right] (lambda () (interactive) (goto-char (1+ (point)))))
+(org-defkey org-columns-map "\M-f"
+	    (lambda () (interactive) (goto-char (1+ (point)))))
+(org-defkey org-columns-map [right]
+	    (lambda () (interactive) (goto-char (1+ (point)))))
+(org-defkey org-columns-map [down]
+	    (lambda () (interactive)
+	      (let ((col (current-column)))
+		(next-line)
+		(move-to-column col))))
+(org-defkey org-columns-map [up]
+	    (lambda () (interactive)
+	      (let ((col (current-column)))
+		(previous-line) 
+		(move-to-column col))))
 (org-defkey org-columns-map [(shift right)] 'org-columns-next-allowed-value)
 (org-defkey org-columns-map "n" 'org-columns-next-allowed-value)
 (org-defkey org-columns-map [(shift left)] 'org-columns-previous-allowed-value)