Even though you have specified a width of 526 are any widths for elements or labels combined to be greater than this value? It seems like the elements and labels may be larger than this. Also if you have css applied to the div that the form is in any margins or paddings could also affect the size of the area you are working in. Please post back with some more info about the form that you have setup and if you have a link to the live page that would be most helpful.