Got a second issue. WPMu 2.8.4. Same thing happening on two separate themes by two different authors in FF3, IE6 and IE8 on two machines. IE8 does try to open the window farther but then it collapses again to a single empty line. Found the posts on wp-footer fixes. Both theme footer php's were already set correctly but I tried both fixes anyway, moving commands around just to see if any difference. None. Scoured teh code to try to understand how it works and look for anything that might stand out. Compared the Javascript code at the bottom of single pages, where the series list does work, and it is exactly the same, with the exception of the addition of a second slider line on the front page:
initSlider('#hackadelic-sliderPanel-2', '#hackadelic-sliderNote-2');
Both posts on the front page are in the same series.
Haven't found a way to just not have the series show up on the front page yet, other than set:
div.hackadelic-series-info.on-frontpage { display:none; }
which solves the problem one way, but not the way I'd prefer.
I've been up all night, so not exactly the sharpest bulb in the hardware store, so probably have missed something multiple times.
Thanks.