Pierre has good suggestions.
Note if upper cuff is too big around for your leg, there is a product that adds a layer of neoprene to the inside of boot tongue to fit this lower legs better. I saw it in "new gear" section of one of last years ski mags. Check ski mags, or a boot fitting shop can fashon the same out of foam.
One cause of shin bang is the all too common practice of loosening upper cuff buckles and power strap to "soften the flex" or "get forward" (which in reality does neither). It just leaves the leg banging around in search of something to lean against.
To reduce "bang", you actually want to keep the top upper buckle and power strap firm so there is no extra space around leg, and to move leverage point up as far as possible on shin so lower leg just above ankle doesn't "bang" by trying to flex boot where it has no leverage to do so. Aditionally, setting the second buckle down a bit looser will give a softer feel to the flex, if you feel you are up against a "wall" otherwise. A competent boot fitter can also V-cut sides and/or back of the top of the lower shell the cuff wraps around to allow softer flex with cuff buckled properly to fit firmly around leg, again if required.
It is an issue with solutions.
[ January 02, 2003, 08:09 AM: Message edited by: Arcmeister ]