Yes I began having this problem 2 days ago. I've given up posting links to articles in the archives as a result. Thinking it might be a cache-related problem, I performed a deep cleaning of my cache yesterday. But it didn't help. If I leave the frozen screen up long enough I get a 524 error message. It says my computer is fine & the network is fine but there is a problem with the host's site. I have no way of knowing if that is correct.