Well just been on the phone to ICE - looks like my Alfine hub gear is being returned to Madison under warranty as it's misbehaving. Gear 2 doesn't work at all, gear 4 is dodgy and now 5 has started playing up. It's only done 1250 miles so is due its oil service but this sounds unrelated to oil and seems pretty major to me. ICE are being great, as always, but it's a bit disappointing.