As an addicted OS X user I just stumbled upon a small artefact in the “mysteinberg”
I am changing ISP and hence im changing my email address around the various sites, but in the “mysteinberg” site I was immediately prompted with a “re-enter new email” even I didn’t do anything yet, I rechecked and reloaded a couple of times with the same result, so I switched to Firefox and everything worked flawlessly.
To me it would make a lot of sense if all web sites, including “mysteinberg” was safari compatible but maybe it’s complicated due to some apple policies ?