Newsgator Online Has Stopped Working?

Huh... I use Newsgator Online because I have so many machines. I don't know if I should hold this out as an example of the problem with browser-based applications, but suddenly Newsgator Online has stopped properly marking articles as read. The problem extends across both Firefox and IE7, so I don't think it's some errant extension in my browser.

Gee, that sucks.