I regularly read a blog called Same Difference - http://samedifference1.com/ - which is a wordpress.com site.
They seem to be using either a theme or a plugin that loads entries at the bottom when you scroll down, rather than using a paginated index. I use mostly OS X and Linux, and have tried it on Firefox and Chrome on both platforms. When you scroll down and the load-more routine kicks in, the index page goes blank every time. The title remains, but no content. I have contacted the author and she says the problem doesn't affect her - I'm not sure what platform she's using but she says "try it on a PC", which suggests Windows.