Comment 10 for bug 750585

I think on the whole I'm probably OK with going ahead with this on the basis of the extra effort wasted in cross-building projects if we don't. Lurking breakage worries me a bit, but at least it's only build-time and fairly simple to resolve. However, I'd recommend giving the security team a heads-up so that they know what's wrong if they encounter problems due to this post-release.