Off and on, when I try to open an individual post by clicking on a link to that post the page template loads but not the info -- just a blank area where there should be content.

At one point, a little annoying pop-up survey appeared in the upper left corner of the screen which I quickly closed without reading. Coincidence?

Anyone else experiencing this?

Edit: Mostly observed when I'm in User CP and click on a Last Post link.

 

I had similar trouble with it simply not opening pages late yesterday afternoon, but today it seems better....