Problem with Illustrator CS3 transform tool

Question

When I draw an object in Illustrator, for example a rectangle, then use the transform Height & Width boxes in the options bar to resize the rectangle into a square, the resulting square will not reflect the original size I wanted. For example: the original rectangle was 240 points by 174 points. I typed 250 points into the W & H boxes of the option panel to resize the rectangle into a 250 point square. Instead of a 250 point square, I get a rectangle 249.979 pts by 249.983 pts. Trying again with the same 250 point values will give me 250 pts by 249.993 pts. Trying a third time will result in the size I wanted originally. This has only started to happen within the last few weeks. I don't know what I did to cause this. Does anyone have any ideas??
Many thanks in advance, Fred.

Answer 1

Use preview bounds get turned on?  Look in the flyout menu of your align panel.
Snap to grid or snap to point get turned on? (I think that might do it too...)  Look in your view menu.