I have the same balance problem, but only (and always) while on my feet. I had back surgery in Nov 2010 and this has been with me ever since. My docor said it may be a circulation problem to the back of the brain. Said nothing could be done for it. I am learning to accept this. I have other problrms more pressing.

Severe RLS. No feeling in my feet and trying to learn to drive with handcontrols. Husband with terminal lung cancer