In CS4 I can turn off preferences >> smart Guide >> alignment Guides(OFF), and that turns of snapping for me to the artboards. Unless they changed this for CS5 would believe this would work for you too.

Also turn off align to pixel grid in CS5 if you have that on in the transform palette.

Oh my god guys you saved my macbook, I was about to throw it from the window after an hour of unsuccessful attempts to move a couple of lines around, this snap was ruining it again and again and I was really pissed off after turning out all snapping options in the program and still having this snap to artboard.

Thanks for helping with this annoyance!

EVERYthing I try, does NOTHING! this is outrageous. Snap to whatever is still persistent with illustrator CS 5.0.

What an unreliable feature! When you need it to snap, it fails.

I have often zoomed in due to an acute lack of confidence.

And sure enough, my selected object did not do what it lead me to believe it would do.

Is this product now a victim cheap offshore child labourers?

  This brutal flaw wastes SO MUCH of my time each, and, every day.

I'm new to CS6...upgraded from the very old CS3 and I had trouble moving object in tiny increments without it snapping back to where it originally was.

I too had turned off all the "snapping" stuff under Preferences and under Window...but nothing worked...

MY SOLUTION... turn off the anit-aliasing feature hiding under the transform window.

Note: I plan on turning this back on again once I'm done creating this artwork, since I am using it on websites and have learned that the anti-aliasing makes the type appear crisper when converting to a PNG.

Hope this helps.

Guys, I had given up on Illustrator because of this.  I had been doing all my vector work in PS.  I'm using CS6, and NONE of the above worked for me.  But I figured out:  When you create a new document make sure you turn off "align to pixel grid IN THE NEW DOCUMENT DIALOGUE!   (apologize if web shouting is offensive to some, but some of us are in a hurry and quick glances are more effective like this!)