I should mention I have my own child theme that should be overriding everything. Like I said, it works now, but only provided that bbpress.css is deleted from theme-compat.
Thanks for your comments.
I’m assuming you had a backup copy of your stylesheet? Either way, it should only have header info in at the point of copying things over. I’ve made the tutorial clearer about that, though.
I never bother with screenshots for themes I’m making for myself, but I’m sure others do. I figured I’d leave that up to the user, but I’ve added a sentence about that.