I cant find any way to nudge the notes without turning the grid off.
Welcome to life on Mac OSX, hope you visit my webite.
"Cursors (arrow keys)
Use to move around - left to right, or up and down, in Ableton. Up down cursor also moves a loop by the loop length which is very useful. You have to select the loop at it's top for this to work. Cursors will also move a selected note up/down or left/right. Alter values of numbers, rotate knobs and move sliders. With the grid off, arrow keys will move notes incrementally right or left, and holding shift with the arrow keys will increase or decrease their lengths incrementally."
from my site, page 2
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