Would not tinker with TVHeadend except when the IceBox is a backup. And if you are happy with the possible need to do a soft reset.
The IceBox team (aka Daniel Hall) is working on a fix, so I would not resort to tinkering unless channels are "physically" absent or have not been mapped, and a soft reset has not fixed things.
The IceBox team (aka Daniel Hall) is working on a fix, so I would not resort to tinkering unless channels are "physically" absent or have not been mapped, and a soft reset has not fixed things.