Black hole error when closing the preview window.

[Fredrik]

If I close it with the x symbol in the upper right, I get the page not found / black hole error.

 

[phinds]

I too have been seeing a LOT of black hole pages. Haven't looked at when it's happening just that it seems to be happening when I don't expect it.

 

[DrGreg]

We already have a thread on this: Preview Overlay Closing Problem

 

[Greg Bernhardt]

I've tracked down the problem and hope to fix it in the next few days