Oddly, the i-CAN at first refused to tune-in Freeview HD's hi-def channels, and even though it succeeded at the second time of asking, other normal Freeview channels suddenly lost their stability.
It does suggest that the i-CAN's DVB-T2 tuner isn't as sensitive as it could be (we had no problems with a variety of other Freeview HD boxes in the same testing location).
We also had problems with the BBC interactive service – pressing the red button brought up the menus only in the corner of the screen, and over-large and obscured, at that.