ESMI, it's too late I've already edited the stylesheet. I could overwrite with the original but then I'll lose all my changes.
I find it crazy that people should not be able to change the stylesheet. It's right there for the changing on the admin panel, and I would think that most people would want to tweak a few things. In particular there is WAY TOO MUCH empty space at the top of the theme. Anyone who understands the value of real estate on a web page would know you can't have all that white space there.
If it's really a problem when someone changes the css file, I would suggest setting it up as read only, and forcing people to make a child template if they want to change it. wouldn't that make sense?
So if I really am causing a problem, I'm willing to try to redo it. Can you let me know, what exactly is the problem? it's kind of vague "having access to an unedited version of the theme is vital when dealing with a range of site issues". will I run into problems if I try to change to the new theme? what problem(s) am I creating?