"Load more items" on support community activity page not working

I was torn whether to post this here or in the section for the support community. Decided to post it here since it works with at least one other browser...

Using Safari 8.0.6 under Yosemite (10.10.3), If I click on my "Activity" link at the top of the page when I'm logged into the Apple Support Community, I can only scroll down through a certain amount of "activity" before I get to the end of a page and a link that says, "Load more items". If I hover over that link, the status at the bottom of Safari says "Go to # on this page". If I click it, I go to the top of the page and no more activity loads.

With Firefox 38.0.1, if I scroll to the bottom, I get a spinning wheel for a few seconds and then more activity fades in for me. I can continually do that as I scroll down.

With Chrome 43.0.2357.81, I get the same symptoms as Safari.

Any ideas?