so i ended up skiing about 5 times or so with the cast. There was one time when I fell when my thumb began to hurt. Didn't think it was to big of a deal, and the pain was gone within a day or too. Few weeks later...Today I got my cast off, and as soon as I looked at my thumb I knew something wasn't right. Turns out I must have re-broke it when I fell, causing it to heal in a odd position. Looking at my thumb the bone sticks out creating a big bump, and giving me limited movement. Because of this I will have to get surgery and my ski season is over :(
Morrow of the story is to listen to your doctor. I felt that because I had a hard fiberglass cast, that I would be protected and there was no way I could mess up my thumb anymore. Now I have to have surgery and miss the rest of the season.
This isn't made for you to feel sorry for me, but instead, be smart about your injuries.