[memetichazard]

I run into that quite a bit. It generally happens when you sit on a page for a long time - somewhere between half an hour and an hour, I'd guess.

How should this to be fixed (if it does)? 5 second timer on the 'Unknown/Expired Link' page that redirects to the front page?

[smokestack]

If you can reasonably predict when the list will expire, removing the "more" link from the DOM (replacing it with a notification to go back to the first page) would remove some of the inconvenience. There are probably a few better ways to deal with it, I just don't understand why the problem needs to exist to begin with. The same problem exists on Reddit incidentally.