Go to your Settings->Permalink page and save the settings. Does that fix the issue?
It will either fix the issue instantly, or not at all.
Perhaps you have some form of caching interfering?
I do not think so, all cache are removed. can I downgrade wp?
Im also having isues with the 4.2.2.
I would also like to downgrade!!!
WordPress 4.2.2 is a security release. Downgrading is not a good idea.
If you have problems, then actually fixing them is the best course of action. Downgrading won’t fix them and will open your site up to possible attacks.
I had the same problem, page load error on every individual post, I followed the advise on navigating to the permalink page, changed nothing and saved the settings. Now the problem is fixed. Very frustrating uncovering the problem, and trying to fix it before coming here.
