=== modified file 'sale/stock.py'
--- sale/stock.py	2010-08-19 13:10:04 +0000
+++ sale/stock.py	2010-11-04 11:56:41 +0000
@@ -196,12 +196,13 @@
         for pick in self.browse(cr, uid, ids, context):
             call_ship_end = True
             if pick.sale_id:
-                for picks in pick.sale_id.picking_ids:
-                    if picks.state not in ('done','cancel'):
-                        call_ship_end = False
-                        break
-                if call_ship_end:
-                    self.pool.get('sale.order').action_ship_end(cr, uid, [pick.sale_id.id], context)    
+                if len(pick.sale_id.picking_ids)>1:
+                    for picks in pick.sale_id.picking_ids:
+                        if picks.state not in ('done','cancel'):
+                            call_ship_end = False
+                            break
+                    if call_ship_end:
+                        self.pool.get('sale.order').action_ship_end(cr, uid, [pick.sale_id.id], context)    
         return res
 stock_picking()