weird full screen problem

I use scrivener full screen (lion view) on one computer with no problems. However, I’m having a weird problem on another computer. When I switch from windowed view to full screen in lion, the text collapses down to this strange narrow page. I can magnify the text, but I can’t make it fill the screen. See attached image. Is this a bug? or have I inadvertently hit some preference which I didn’t know about?

please help, its annoying.

Preferences > Editor > deselect “Use fixed width” (it’s turned on by default for full screen so that the text doesn’t stretch miles across).

Thankyou! did the trick! boy, that one is tucked away…