Both Acer and HP are still seeing drops in notebook shipment numbers owed in part to an ongoing iPad effect, PC component firms claimed on Monday. The companies were originally slated to have shipped 3.6 million and four million notebooks each in November but have reportedly had to scale back to maximums of three million and 3.4 million, a reduction of 600,000 below what each had originally thought. Their shipments were to help clear unsold stock, the insiders told Digitimes, owed partly to a tablet market which Apple continued to dominate.