This has been pointed out before.

This is not really a problem if you have a small tripod/panohead to cover. But!

What you can do is! Convert your panorama image to cubic.

Add the tripod cap using Photoshop etc.

Bring the image back into Panoweaver and either make your movies straight up or convert the image back to spherical and then make the movies.

Regards, Smooth

I had the same problem and I found out that if you stitch your image after having imported the floor image, then import this saved panoramic image, your published tour will look ok with the floor image covering the whole black hole.

Regards, Alexandre