For me, the "practice" that Amy wisely suggests above involves the use of slides. I slide up and down scales in order to find that breaking point, and learn to compensate for it. What works for me (but may not for you) is to pull back a little when approaching the point between the chest voice and my falsetto. It's a tricky thing, but with practice, has become easier. Getting another opinion from someone who can *be there* with you to see and hear what you are doing will also likely help. Many here may be great coaches, but, like a Doctor, if they can't see (hear) the symptoms, the diagnosis may not be as accurate.
Good luck! :D