We have a flag for the print preview to be Portrait or Landscape based on your requirement. You need to add a line i386 = 1 or 2 in the common.txt file Ability to force portrait/landscape to a page's layout.
i386: 0=do nothing. 1=Portrait. 2=Landscape.
Make sure that you clear the cookies and cache, rename the config.zip to a different name before retrying the page again.
