Yes - It was created in an earlier version, then opened and edited in the beta version. One created in the beta version from scratch works fine. Take that back. After I added the three new panos, it no longer works correctly. Plus, the styles of the hotspots get messed up. Wrong icons or no icons.
I would be interested in your APT project file created with the earlier version (hence the one which does not work in beta 9). I would also like to have a look at the second one (created from scratch in beta 9), if you provide me the exact steps to reproduce the problem, and the description of the problem. You can send all this via private message.