Ok- hope someone can help, as this is driving me nuts! I have 2 divs, left-floated within a wrapper div. The rigth side div is set to overflow:auto. The content correctly shows up with a scrollbar at most sizes. However, when I make the page narrower, it falls to the next line, instead of making the div narrower- why? Now, I realise I can set a min page width to stop this from happening, but right now that would have to be set at something like 1300px, which seems too wide to me for a min width. But I don't understand why the right div would fall to a new line instead of just getting narrower?