Hi all,
Firstly, sorry that some of you are still experiencing this. I know it's really frustrating and we want to resolve this.
I just wanted to explain a bit more about what happened, and why the suggested fix has been clearing your browser cache.
Last Thursday, while we were making some planned changes to our server setup, we made a mistake in a configuration change. We spotted it very quickly and reverted it within about 45 seconds, but during that short period some pages on the site were incorrectly redirected and showed a 404 error page.
Unfortunately, for some users, browsers then cached that error locally. Because the issue is being stored in the browser rather than on Mumsnet itself, there isn't anything we can clear remotely from our side, which is why we've been suggesting clearing browser cache.
We know that advice can feel annoying, but for most people affected it has resolved the issue. The fact that Mumsnet works in an Incognito / Private window is also a good sign that this is the same browser caching problem, as those windows don't use your existing cache.
That said, we want to make absolutely sure we're not missing anything. If you get another 404 error, it would be really helpful if you could copy the full web address / URL from your browser and post it here or email it to us. That'll help us check whether there might be anything else going on.
Thanks for bearing with us while we get to the bottom of it.
Matt