Looks like I should have kept my mouth shut

It was percentage based previously but I changed it to fixed width as some times I need a page to look a certain way and you can't do that with fluid pages that stretch all over the place.
What I will do is offer both options - a fixed width where everything lines up nicely and a widescreen option where people will have to accept whatever gets sent to them lol
Thanks for all the comments, it's amazing what one small change can cause
