I Unbroke My Site
This is a really major irritation. I’ve no idea how this happened, but apparently the Featured Content Carousel plug-in became activated on my website. I don’t know if I was experimenting with something and didn’t realize what I’d done, or if it was some theme I tried out briefly and then deleted, or what.
At any rate, the Featured Content Carousel deactivated the slide-box on my main page, making me think it was broken. I decided that this had happened because of the upgrade to WordPress 3.0 and decided I needed a new 3.0-compatible theme. So I looked and looked — the theme I originally tweaked (Revolution Office) apparently no longer exists — and found something called Work Place from Press75.com looked the closest to my theme.
Bought it; installed it; realized it was never going to work without major tweaking. Complete waste of $75!
A little more poking around on the web and I discovered that the Revolution Office theme on which I based my theme stops working correctly if the Featured Content Carousel is installed and activated.
Deactivated the plug-in. Problem solved.
I’m still out $75.