Last week I wrote about Bleeding Edge: version WordPress.com “edit link” broken in latest Google Chrome stable build – or is Vodafone causing this? #fail.
Since then I have researched this further: I verified that the http://1.2.3.4/bmi-int-js/bmi.js link indeed was caused by Vodafone.
They use a mechanism of directing all HTTP traffic through a transparent proxy and rewriting both the HTML and images in compressed form in order to save bandwidth.
There are a few problems with this: