I think everyone has a problem with it
My solution today is to move it back into position after a bump. I can do it without though now and know exactly where the shadow from my front wheel needs to be in relation to the beam edge for correct positioning. I moved it ~12 times this morning on my 8mi commute. I figured if I was paid 25 cents for every time I moved it I'd have the $62 more that the L&M would cost me, and I've only owned this light ~2mo., after a year or so we will be talking pennies a move.
Al