it's the entire page thats too big, and when I found it I thought it would just be the one computer too, but the same problem is on firefox on every computer I've been able to check....except mine! On Chrome, IE etc the page fits nicely into the screen, on firefox it has a scroll bar at the bottom and only about 3/4 is viewable within the screen. Hope that makes sense.
I've validated the output - no errors.
I've just included the very first part of code as the rest concerns text only and I'm assuming I've missed something out of this part rather than it being the text thats the problem, since everything is oversized.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Greenaway Amenity Limited - The Natural Choice In Weed Control</title>
font-family: Arial, Helvetica, sans-serif;