When connecting through Vodafone 3G/UMTS, it leads all http traffic through a transparent proxy.
In The Netherlands, hyves is a pretty popular social network (especially for maintaining the family and friends part of your networks).
Vodafone 3G/UMTS breaks the email functionality of hyves.
The Vodafone transparent proxy loads http://220.127.116.11/bmi-int-js/bmi.js, and I bitten by this proxy before, so it was pretty easy to find the cause.
There is no work around (apart from RDP-ing into a remote machine and doing all the browsing from there).
I’ll blog about what Vodafone does in a future blog post, because they do a couple of things that I think are pretty rude.
But more on that later.
Most important thing to know that if something doesn’t work that normally works, and the only difference is that you are connected through Vodafone 3G/UMTS, then it is probably their transparent HTTP proxy breaking it.