(gnus-pick-mouse-pick-region): Switch 1 => point-min.

(gnus-generate-vertical-tree): Usue `bobp' rather than compare to 1.
(gnus-highlight-selected-tree): Use point-min rather than 1 and 2.

lisp/gnus/gnus-salt.el

@@ -230,7 +230,7 @@ This must be bound to a button-down mouse event."
   (let* ((echo-keystrokes 0)
 	 (start-posn (event-start start-event))
 	 (start-point (posn-point start-posn))
-	 (start-line (1+ (count-lines 1 start-point)))
+         (start-line (1+ (count-lines (point-min) start-point)))
 	 (start-window (posn-window start-posn))
 	 (bounds (gnus-window-edges start-window))
 	 (top (nth 1 bounds))
@@ -266,17 +266,18 @@ This must be bound to a button-down mouse event."
 	     ;; Are we moving within the original window?
 	     ((and (eq (posn-window end) start-window)
 		   (integer-or-marker-p end-point))
-	;; Go to START-POINT first, so that when we move to END-POINT,
+	      ;; Go to START-POINT first, so that when we move to END-POINT,
 	      ;; if it's in the middle of intangible text,
 	      ;; point jumps in the direction away from START-POINT.
 	      (goto-char start-point)
 	      (goto-char end-point)
 	      (gnus-pick-article)
 	      ;; In case the user moved his mouse really fast, pick
-	    ;; articles on the line between this one and the last one.
-	      (let* ((this-line (1+ (count-lines 1 end-point)))
+	      ;; articles on the line between this one and the last one.
+	      (let* ((this-line (1+ (count-lines (point-min) end-point)))
 		     (min-line (min this-line start-line))
 		     (max-line (max this-line start-line)))
+		;; Why not use `forward-line'?  --Stef
 		(while (< min-line max-line)
 		  (goto-line min-line)
 		  (gnus-pick-article)
@@ -787,7 +788,7 @@ Two predefined functions are available:
 	  (setq beg (point))
 	  (forward-char -1)
 	  ;; Draw "-" lines leftwards.
-	  (while (and (> (point) 1)
+	  (while (and (not (bobp))
 		      (eq (char-after (1- (point))) ? ))
 	    (delete-char -1)
 	    (insert (car gnus-tree-parent-child-edges))
@@ -858,7 +859,8 @@ Two predefined functions are available:
 		(gnus-extent-detached-p gnus-selected-tree-overlay))
 	;; Create a new overlay.
 	(gnus-overlay-put
-	 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
+	 (setq gnus-selected-tree-overlay
+	       (gnus-make-overlay (point-min) (1+ (point-min))))
 	 'face gnus-selected-tree-face))
       ;; Move the overlay to the article.
       (gnus-move-overlay
@@ -1062,5 +1064,5 @@ The following commands are available:
 
 (provide 'gnus-salt)
 
-;;; arch-tag: 35449164-77b3-4398-bcbd-a2e3e998f810
+;; arch-tag: 35449164-77b3-4398-bcbd-a2e3e998f810
 ;;; gnus-salt.el ends here