I tell ya, if it is not one thing, it's another. The old saying is true, if you want something done right, you'd better do it yourself. I found a free Joomla template that was close to what I needed, and modified it from there. I should have coded it all from scratch. When you use Adblock Plus or similar, the top banner position collapses, and the background image, which has the black bar in it, moves down the page. Click to enlarge.
I have no quick fix for this. What needs to be done is Joomla needs to be put in the same template code that I am using for Movable Type. Sadly, this same template is being used by the Events Calendar, too. This needs to be fixed pronto. Thanks to Chase for bringing this to my attention.
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what is this! are you kiddin me!