I wish I had seen this before I bought a Currys Essentials at 6pm today
It isn't just the multimedia keyboard either; mine is the basic one.
This is the second keyboard in a row that panics the kernel; I bought Wilkinson's finest on Friday.
The ASDA one and the Cherry work perfectly, so it isn't user error, and it almost certainly isn't power; this one is only 50mA.
It isn't necessarily the cheap ones; ASDA's is half the price and it works.
I Wanna Play With My Pi!
ETA: The Satzuma.com Roll-Up keyboard does the same. At least that was a Christmas present.
And I've tried them on a powered hub now. It is not power.
Thanks bigsi111, I see a Tesco's in my future.