I think I set up Rotating Posts correctly. I haven't updated any of the plugin code, just overwrote the CSS. It looks exactly the way I'd like it to.
For some reason though, the posts aren't rotating. I've tried in several browsers on several computers. You can see it in use on this site, in the white strip that has arrows and starts with Case Study 3:
Unfortunately none of the posts about this issue seem to describe the solution. I'd appreciate any help. Thank you!