CMS: 1.9.1
To fix my previous bug, I had to add the proper DOCTYPE to the top of my template.
Before doing so, a table in my left sidebar looked like this:

I like the lines and highlighting of the title. Chrome reports on this this way:
background-color: #666;
border-bottom-color: white;
border-collapse: collapse;
border-left-color: white;
border-right-color: white;
border-top-color: white;
color: white;
display: block;
When I add just the following at the top of the template
then the same section of my site changed to this:

without the lines and highlighting of the title. Chrome reports on the same :
background-color: transparent;
border-bottom-color: black;
border-collapse: collapse;
border-left-color: black;
border-right-color: black;
border-top-color: black;
display: block;
What am I missing here?