GitHub Pages does not support SSL
GitHub pages, a way for GitHub pages to host web pages at a subdomain of github.com, does not support SSL. https-everywhere tries to redirect to SSL versions of these sites. This breaks Firefox extensions which try to download data from one of those pages.
The main page for this GitHub feature is here:
The specific page I had a problem with is:
http://sebuilder.github.com/se-builder/
Trac:
Username: brainsik