Fed up of expired web page?

What browser are you using?

I've not seen that issue with IE or Firefox, but then I always open threads in a new tab, rather than going to a page and then 'back'.

Of course, the Latest Posts page will have expired, since it will have changed to reflect the latest posts...

An issue with the browser or its settings, rather than OM, I think.

I find that the F5 button is a very useful thing to know about. It refreshes the page. Sometimes it comes up after pressing F5 that the page has expired but it gives the option to cancel or click retry which is what I do. This works sometimes for me as it results in the page coming up.

Not sure if this exactly applies to your situation but can't hurt to give it a try (if you haven't thought of it yourself already).