I apologize to those that have come here recently to look at an individual post and found it unreadable. A helpful comment noted that while the main site looked fine, the individual post page was screwed up. I had forgotten to apply the same trick to the Single Post template (page.php) that I had applied to the Main Template (index.php). It should be fixed now. If this problem shows up anywhere else, please let me know.

For those who are interested, getting a scrollable DIV is fairly straightforward. The key is to set a fixed height, and then set overflow to "auto". Like this:

.scrolldiv {
height: 500px;
overflow: auto;
}

Then, if the content exceeds that height, it will give you a scroll bar automatically. Look for a belated "this week in debugging" with more info later today...