YouTube and 1.02.xx?

Black Hole

May contain traces of nut
Although I can get to the YouTube interface on my 1.02.20 HDR-FOX (via a CF custom portal which bypasses the Humax server), none of the videos I have tried actually play - the spinner spins interminably, and the streaming buffer (also monitored via CF) doesn't even reset from the previous contents.

The same YouTube videos play fine via the TV Portal on my 1.03.12 HDR-FOX. It looks to me like the YouTube feed is no longer compatible with 1.02.xx, in addition to iPlayer no longer supporting it.