C4+1 Freezing & Pixellating - Anyone Else Getting This?

Just to report that although Ch135 for C4+1 is in my Sky box's EPG and in Tivo's EPG when I change to the channel I initially get no picture and then I just get a stuttering and pixellating one. Yet my box is fine with all other channels.

I suppose someone will suggest I need to power my box off and back on again bit it goes off on a timer for 5 minutes every night already so should this really be necessary?

Is anyone else getting this problem with C4+1 on Sky on Ch135?