MarketPress pagination on WP 3.4

After upgrading to WP 3.4, pagination doesn't seem to work. When I manually go to /page/2 I get a 404.
Looking at the changes in 3.4, I happened to see this:

Infinite scroll for themes.php and theme-install.php. Bump per page limit for themes.php to 999

Does anyone know how to implement infinite scroll with Marketpress?

And another question:
I couldn't get pagination to work on the global site. I searched and found other people saying the same thing but some posts say it works, some say it doesn't... Well does it? I don't want to try and fix something on my theme if the reason it doesn't work is not there. :stuck_out_tongue: (By the way, I did try it with marketframe, still nothing).