Strange. I had zero trouble saving the blog to disk with Firefox on a Windows PC.
- it works with both an old generation of Firefox (3.x) and a post 3.x version.
- it correctly opens with the code, in both FF versions as well as IE.
- NoScript also correctly blocks and unblocks the code depending on what access you give to github.com and tumblr.com.
So, not sure what you are seeing, but I am unable to replicate it. As you can probably guess, I am just as sensitive to these saving glitches when they occur as you are too... :)