I have no problems with the sidebars in Versie: 3.15.1 nor in the previous version (neither when the headers were gone).
@cyberchimps I use this theme on a website that was already there when I got the ‘webmastership’. It’s the website of an organisation, so I can’t (or rather: won’t) change anything unless requested. The websites (it’s a network) look pretty old-fashioned, but as nobody is moving in order to suggest a more contemporary looking website, things remain as they are. I thought to use the theme update as leverage to get some motion, but that seem to haven’t worked ??
All this for saying: since the websites will keep looking as they do, I might not be the best reference for development of the theme.
Websites that I maintain in which I do have full control, also look simple and slightly old-fashioned, the good-old two column websites with header. I use another theme for most of them.
One missing setting that I did miss in the day when I had to work around the missing header image was the color setting of the site title text. Even with custom CSS I didn’t manage to change it.