Aaaaahhhhh! I'm a big dork!
I got it working now. I had a "position: static;" conflicting with a "position: relative;" on the same style element.
Thanks so much for your assistance. It helped me feel like I wasn't completely alone, giving me just enough sanity to figure that one out. :-)
I've got one more issue with this menu to overcome. I'll go ahead and post it in another thread.