Where's the postbox? <a href=" http://www.sleepbox.co.uk/esomeprazole-20-mg-twice-daily.pdf#tried ">dangers of taking nexium long term</a> NEW YORK, Aug 9 (Reuters) - U.S. stocks dipped in lightvolume on Friday, putting the three major indexes on track fortheir worst week since June, as investors found little incentiveto buy with equity prices not far below last week's recordlevels.