I'm not sure what "fix" your referring to, but I have a 2001 model and all I've had done is the e-brake mod. (recall) Nothing that will keep you from cutting grass, but it's suppose to be easier to use. (foot brake instead of hand)
Not sure why they think it's any easier, because if you mash the foot brake, the engine kills. OK if your falling down a hill, but not very user friendly if your trying to ease it down the gate of your trailer.
BTW- I love this mower. I love the diesel engine. I wish I could cut in reverse just to smell the fumes. I have no regrets. I smile everytime I pass it in the shop, not to mention everytime I need to use it. If it was anymore comfortable, I'd fall asleep mowing the yard. Check your tire pressure, adjust the seat preload, lean back in the cumfy high-back chair, and mow away. Cutting the lawn will become the most restful part of your day.