Pages don't finish loading

I think this is temporary - at least, I didn't see it do it at work today, however.

All my CB pages continue to load (and never stop circling in the tab).

In the status bar, it's saying 'waiting for s.tribalfusion.com', waiting for fastclick etc, waiting for something or other else.

Edit - I've just noticed, there are no ads on my pages and I let my club membership lapse, so there should be (sorry, Jeff).

Yes, those are ad providers. It looks like there may be an infinite loop problem... I think I see where it is. It should clear up in the next hour or less.