My default homepage is subs, and I don't have nine pages of content on it yet, but I did get multiple 404 errors while going through it. I have auto media preview enabled and it looks like the next page doesn't work until all of the images have loaded on the current page, for some reason. Had no problems with auto media preview turned off.
I couldn't replicate the issue with my homepage switched back to all because I couldn't get to the end of the page and click the next button before all the images had loaded (the next page kept disappearing out from under my mouse just as I clicked it, lol), but page 9 by itself seemed to work fine.