i don't have this problem. although i think i may have had it in BV 9.
i just upgraded to BV 10.12 from BV 10.1 today and opend up a page to check out you suggestion and by gum if the shift keys didn't move the item 1 pixel at a time.

are you using BV 10.12 ?

i am using vista now also if that would make a difference but i think not.
good luck.