Also, I have two other self-hosted WP blogs, and they’re both fine, on desktop and mobile.
I am having the same problem. At first it was ALL browsers, so I contacted my webhost and they said, “It’s not us, try changing your permalinks to default,” which worked on my computer. But this morning people are saying they still get a 404 error. (It’s not the front page, only all the link – ALL THE LINKS!)
http://www.thedirtynormal.com – I’m using Weaver II (NB It’s a sex education blog, generally SFW, but just in case you don’t want to be surprised…)