said 9 months, 3 weeks ago:
I host my site on GoDaddy. I called them. They suggested that I deactivate all of my plugins, clear my cache and then activate my plug-ins. That allowed the HTML to return, the links and insert images to work again, but the CSS still seems to be off a bit.
I expect that there will be a 3.4.2 pretty quickly if this many people are having issues.