If you read the coverage, she went public as she was so angry at Mandelson's attempt to whitewash the whole thing and dismiss it out of hand. All she wanted was for an acknowledgement that No 10 would look into the reports. Also look at some new quotes on the Guardian website from an insider,
"His intense bouts of anger are unremarkable to anyone who has worked closely with him. You just have to put up with this stuff. It is part of the daily experience, almost part of the furniture. He would behave in that way constantly. He suffers from a massive paranoia and an inability to accept blame, yet he runs a blame culture that allows him to blame others.
"He does not seek to win an argument, he just seeks to bully. If you have not worked closely with him before, it is truly shocking. The more he trusts you, the more he vents."
For those of you playing down bullying behaviour at work, I suspect you've never been in a situation where your boss rants and raves, kicks furniture, slams doors in your face etc etc. I have and believe me it's no joke - we're talking living in a constant state of anxiety, sleepless nights at the thought of going into work - not pleasant.
I do not want the country to be governed by someone who cannot control their emotions in a professional setting (or any other one for that matter), nevermind the sheer hypocrisy that is constantly shown from this government - 'do as I say, not as I do'.