Really make it call the method with the query interface

OpenSim/Data/MySQL/MySQLGridUserData.cs

@@ -58,7 +58,7 @@ namespace OpenSim.Data.MySQL
 
         public GridUserData[] GetAll(string userID)
         {
-            return base.Get("UserID LIKE {0}%", userID);
+            return base.Get(String.Format("UserID LIKE {0}%", userID));
         }
     }
 }