Thanks Gary and Michael for emailing me about the broken links.

Gotcha: It turns out that quoting links using """ (say, if you had previously run a script to do a bunch of search/replaces) works in Safari, which apparently just fixes it for you, but does not work in Firefox (and presumably other browsers).

Excellent stuff - having taken our startup from 4 to 50 people, I can say that in my experience, these observations are absolutely bang on.