I don't know anything about it, but just wanted to ask if they have MRI'd the knee?
I have the same issue, Cindy, and I think it was my very first clear symptom (my knee's buckled and I went down regularly). There hasn't been any pain YET, but I can imagine that after a while of doing this a person could cause additional damage.
Perhaps it is just a MS-strength issue at this point, but it might be worth checking if there is something "fixable" going on too.
Cherie
__________________
I am not a Neurologist, Physician, Nurse, or Hairdresser ... but I have learned that it is not such a great idea to give oneself a haircut after three margaritas
.