Yes, I did hear that The Dark Knight actor Christian Bale "lost it" on the set of his new film Terminator Salvation, but only now stumbled upon a more detailed story on the National Post newspaper website. The same thing I asked when I heard that Seinfeld actor Michael Richards did his tirade in front of an audience at a comedy club was, "why?".
Since I gravitate more towards 'techs' than actors, I sympathize with the film crew who had to witness and be victimized by the raging too-big-for-his-own-britches star (or whatever those people are called).
What this particular production needs is a producer like the one in the 1964 television feature The Movie Maker. Rod Steiger has to come down to the set and put the temperamental actor in his place (tear a strip out of).
If I was The New And Improved Terminator's producer -- and the production wasn't too far along in the shooting schedule -- I would have fired Bale on the spot. (SAG can bugger off.)
Some actors have to be dealt with very harshly.