Can't Auto-Update to 3.5.2

None of my dashboards for the 4 wordpress sites I run are showing the update for 3.5.2 even if I hit the “check again” link. I could manually install but am looking for another way around such a time-consuming process for 4 sites (as one can imagine). My web host will not provide support to this as it’s a third party script installation. Why would my wordpress dashboards not show the update? It has to be some sort of server issue with my host as it’s universal to ALL sites on the host. I wonder if it’s an outgoing connection management issue, but I don’t know the IP address of whatever host will give me the update.
Thanks for the help