I changed to the Atahualpa theme today. I have found how-to's for all of my questions for configuring background image, background colors, sidebar colors, fonts & links throughout by searching this excellent forum.
However, I have not found why my header images are not rotating. When I first uploaded header images they were rotating. I'm not sure what I may have done to stop the rotation. I can tell you that I initially loaded a batch and then added a few more one at a time.
Searching the forums I find suggestions for bug fixes and version updates. I believe, having added the theme today, that I'm on the latest version. My version is 3.7.7. I also found the suggestion to make sure file names did not have spaces. Several of mine did, so I renamed them via FTP.
What else should I look at?
my page is http://blog.bigskycountry.net