Here we go again:  The "National Enquirer" claims ASHTON KUTCHER has been acting like a basketcase on the set of "Two and a Half Men".  (Of course, this IS the "Enquirer", so take this with a grain of salt.)  Supposedly, Ashton was, "a breath of fresh air" after replacing CHARLIE SHEEN last season, but now, things have changed.

A so-called "insider" says,  "It's pretty clear Ashton is not as enthused about [the show] as he was last season.  Some people are even calling him 'Charlie Junior' behind his back.  Ashton [is] complaining about everything from the scripts to the makeup and even costume choices.  [He] feels he's being undervalued.  At this point, I think it's doubtful that he'll return next season."