Good to hear CentralDS are sorting this out. My camera was done several years ago and is being currently used by Virgs. It works fine and has always done so. CentralDS will do a good job of fixing it, they have great service and you will be back in business in 4-5 weeks.
Just recieved word my 40d cooled camera is on its way back from cental ds
it was the shutter blade and they replaced the shutter unit and did it for free ,i would highly recomend central ds service.
ALAN