I have 2 Mac's running 10.9 and creative cloud. One configuration runs perfect and the other has one bug since I installed CC.
In illustrator, items keep snapping to grid, despite these settings are all turned off. It is simply not possible to perfect align 2 items. Not even when using the align tool or pathfinder.
Adobe support could not help me, reinstalling the OS and CC did not help.
I hope one off you recognizes this and has the solutions.