When viewing the printer friendly version of a form, the window has horizontal scrollbar. Text that is outside the immediate view will be cut off in the print preview and actual printed item.
Printer Friendly form view
This is caused by a long, unbroken string in one of the fields on the form. To identify the field causing the issue, drag the horizontal scroll bar all the way to the right and then scroll down the page. When you see the long text string causing the horizontal scroll, you have found the problem field and text. The unbroken text is treated as one long word and cannot be wrapped.
An example can be seen in the image below. Note the highlighted text is a long string of id's that contains no spaces.
Place spaces in the long, continuous text string to break it up. This will allow the printer friendly view to wrap the text.