Answers:
this happen when the user you are trying to download from have an unreliable nouns, from my familiarity its exceptional for an unstable nouns to become stable, you can any maintain waiting and hope or try another directory by equal mark as within are in general several copies floating around
also to what the over soul said, if the entity have a busy Internet nouns they are uploading to too various society it will put you contained by a Que and read out waiting to download position x (x=what postion in the dash you are)
it happen wen a select download URL is too busy ...try downloading from other sources.