D.S.
I know you posted a while back (this digest found it's way into my spam mail), but I thought I might throw this out to you too. My daughter is also extremely clumsy. She has already had 3 black eyes and she is only 8. I took her in for testing for dyslexia and found out t hat she is also dyspraxic. It's literally clinical clumsiness.
Some of the other symptoms were slow to meet milestones. My daughter did not walk until 17 months. That was the only milestone that she was slow to meet, but when she was diagnosed everything seemed to make sense about her clumsiness.
Best of Luck!