"All Plurks" timeline is empty on Mac Browsers

In both Firefox and Safari on my Mac, I cannot view "All Plurks" on my timeline. It's fine if I view my plurks or private plurks (via tabs at the lower right), and if I click on any of my friends/followed people, I can see their plurks in THEIR timelines. It's just the combined timeline that is not visible.

I have cleared cookies and cache files, and do not have a custom design on the page. Problem occurred between yesterday evening (1/9) and this morning (1/10).