Issue with some CSS being ignored and no scroll bar showing on a single website page

Question

I have a website that has 10 pages. It's all pretty basic.

I have a page that uses swfobject.embedSWF and on this page I have 2 strange issues:

1. CSS regarding navbar spacing is ignored.
2. No scroll bar is shown. For example the only way that the user can scroll down is by doing a two finger swipe down on their touch pad.

Would the swfobject.embedSWF cause such problems?

All pages are laid out exactly the same, the only thing that is different on them is the paragraph content, but on this certain page I use swfobject.embedSWF.