Answering my own question, here is where the broken wrist info came from:
"Clarkson wasted no time in spreading the news. She emailed friends, joked about how the job might help her career ("I'm out every night anyway, I might as well make the most of it") and asked if anyone had any black scarves or other accessories she could borrow - the job required black clothing and she couldn't afford to spring for such items, although she had bought a pair of expensive black loafers. She was looking forward to introducing her wide-ranging crowd to a new round of people; she was "everyone's PR agent", as her friend, the actress Martha Smith said. "Call me if you want to be put on the list," she wrote to Robert Amstler, her bodybuilder ex-boyfriend, on 10 January. "I start next week... After being severely injured last year, fracturing both wrists in 22 places, having four surgeries and not working for seven months, I have no choice but to take a 'day' job, only it's at night! Plus, they are willing to work around my acting schedule. Thursdays and Fridays are fun nights called 'Nigel's Back' [referring to one of the owners, Nigel Shanley]. He used to manage the room and throws really nice evenings with lots of interesting people."
The injury Clarkson referred to was nearly incapacitating. And it seemed to be the most recent in a catalogue of accidents. A few years before, while horseback riding in Jamaica with Chris Blackwell of Island Records and ex-boyfriend Dickie Jobson, director of the reggae film Countryman, Clarkson fell and hurt her back. She had to be taken by helicopter to a hospital in Miami. "She was already in pain from an old injury," Blackwell recalled, "and was having headaches." Clarkson's wrist injury happened when she was trying to do the jig from Riverdance at a Christmas party. While dancing with two kids, she slipped on a loose rug and fell, requiring months of physical therapy during which her mother, Donna, her sister, Fawn, and her masseuse took turns feeding and washing her at her small cottage on the Venice canals.
"She was still healing," her masseuse Milena Popovich said a few months after her death, in thickly accented English. "While she was healing, she broke her left wrist again." According to Popovich, Lana's wrists - on the night she died, two years after the injury - were so weak that she had trouble gripping a steering wheel. "Lana was very fragile," Popovich said, "very easily hurt." This applied to her emotional state as well. "Sometimes if you disagreed with her," Popovich remembered, "she would burst into tears. She was like a little girl sometimes."
http://news.independent.co.uk/world/americas/article2386033.ece
Twenty-two fractures - indeed a serious injury!