Acer had high hopes for 2011, but it looks like its expectations may have been a bit too optimistic. Today, the company issued revised forecasts for shipments of its tablet PCs, predicting to move between 2.5 and three million units by year's end -- down from the five to seven million it projected earlier. Acer chairman J.T. Wang expects current quarter notebook shipments to dip by ten percent from their Q1 levels, before stabilizing or slightly increasing during Q3. According to the new-look firm, these downward revisions are largely due to lagging economic growth in Europe, though its Asian and US markets "remain healthy." European inventories are expected to decrease to normal levels by the end of this month, which should allow the company's market share to rebound during the second half of this year. It's certainly not a dire outlook, but it's probably not the start new Corporate President Jim Wong was looking to get off to, either.