Sorry about that. It sounded just like the 'new HD channel' bug. When BBC Three and Four channels went HD a bug appeared whereby recordings seemed to fail with zero length NTS files. It was found that if the failed programmes were decrypted, and the sidecar files deleted, they would then play. There was even a package written, Badnts, to automate this process. In general, this looks like a new bug, or a new variant of the old bug: version 1.03.12 software was supposed to fix this. However, the first programme could be a victim of the old bug: what happens if you decrypt the programme with the zero length NTS file, delete the sidecars and try and play it? If it is still scrambled it must be a new bug or variant: if it plays OK, 1.03.12 software has not fixed the original problem.