Michael, this is not a cache problem. Almost everyone seems to be having this problem, and it seems to be getting worse. I was also having the same problem of finally getting into United and then it showing no posts. Later that problem seemed to be gone, but still can't enter the forum most of the time. And when I can, it usually takes several minutes of waiting before the forum loads.

Could it be something related to the high number of posts in the United forum? Perhaps it has become so large that the "cookie" that looks for posts "in the last 2 days" and such, is taking too long to search through the data base?