Not sure why but when I have my page set for no shoutbox it scrolls funny and things don't show up or they show up weird.
The no shoutbox forum theme? I'm testing it out right now to see if I can recreate anything you're mentioning. So far it's scrolling normally for me, and I don't see anything missing or weird either. Maybe it depends on the browser, though. It could also just be lag maybe. I was lagging the other day and not everything was loading. Have you tested it on a different browser?
Can you take screen shots of what you mean by things not showing up or showing up weird?