I noticed recently, in my pull request #135, that a bunch of commits unrelated to my PR were showing up, indicating that someone had altered the commit history of the official WICG gh-pages branch.

When I attempted to merge the altered gh-pages branch into my fork's gh-pages branch and do a rebase off of that, I noticed that several of the commits in my gh-pages branch's history were missing from the WICG repo's gh-pages branch history.

For example, compare these two histories:

• philipwalton/IntersectionObserver/commits/gh-pages
• WICG/IntersectionObserver/commits/gh-pages

You'll notice that in the official repo's history, all of the commits from February 17 to May 20 are gone.

In addition, if you look at the changed files view of my PR (#135), you'll see my changes contain edits I didn't make, for changes that are newer than the tip of the official gh-pages branch (e.g. the spec link commit from @RByers).

I was going to attempt to resolve the conflicts in my PR, but I think this needs to be fixed first.