Photoshop :: Objects In Photoshop Jump Pixels When

I was wondering if someone could help me with something that is really starting to annoy me.

When I'm moving objects in Photoshop, I find that they sometimes "jump" across pixels when I'm moving them.

For example, lets say I've got an image and I've zoomed in so that each pixel is shown as a large square. The rightmost edge of the image is on column 1 (bear with me).

Each column is 1 pixel wide. So it would look like 1 2 3 etc.

The rightmost pixel of my image is on column 1, and I want to move it to the right so that it is lined up on column 2.

I move my image to the right, but it doesn't land on column 2 at all and skips it, to end up on column 3. So I move it left and it again jumps column 2 and ends up back on column 1.

I hope this makes sense.

I've experienced this on Photoshop 7 and CS2, on 3 different computers. I used to experience something like this in Microsoft WORD during IT classes at school years ago. We had to go into a menu and uncheck something to do with grids, but I can't remember exactly what to do, and I can't find anything that looks familiar in the Photoshop menus.

I really hope this makes sense to someone, because it gets incredibly annoying when I'm trying to be precise.

Sometimes zooming in to 400/500% stops it, and everything moves smoothly, but it doesn't work all the time.

It doesn't always "jump" one pixel either. Sometimes the "jump" can be 3 or 4 pixels wide.