Author of this short script here. I tried to search about this annoying problem in Hacker News - people complain about it all the time but surprisingly there's been no official fix yet. I just wrote this GreaseMonkey script to auto-redirect to the home page when it happens. Not sure if someone's already done that, but I didn't find one on userscripts.org .
The real solution to this problem would be to keep track of the original link and page # you're on, then go all the way back the beginning and click next X number of times if you get an expired error, programmatically of course.
But the 'More' link always generates a unique id, and there is no page number here (or do I not completely understand what you are trying to say?). And even the content on the home page keeps on changing - so you'll miss out on new stuff if I programmatically fetch the homepage and show the user the new 'More' page after that.
Another solution could be to get a new home page and the 'More' page behind the scenes, merge them, and remove the contents that were already on the user's previous screen through javascript. But that'd be a bit complex and still having fidelity issues. So I just kept it simple.
I can just highlight the new links when redirecting though if you think that'll help.
