I think I found a better way to share these photo spheres. The photo spheres I took on this trip were casually done, and people were moving around while I took them. When they get stitched together, sometimes there are two parts of image that overlap, but one part had a person in it and the other part didn’t. In that case, you’ll see a sort of ghostly half-image of the person(s). You can click on an a picture’s caption to get an image you can pan around in.
(Update: I discovered that Google+ displays photo spheres without me needing to do magic stuff with Google Maps to get them uploaded. Here’s the link: Same photos, viewed via Google+.)