Seems to be an issue with twin tuner Alien boxes as well - as far as I recall the sequence is;

- use media centre (or EMC, it doesn't make any difference) to play a recording (music, video - it doesn't matter)
- box starts scheduled recording
- you end playback and exit media player / EMC
- Box reports tuner error and cold start required to regain functionality.

Both tuners set to 28.2 single

Only seems to happen with HDMU running on my Alien 2 - on the single tuner Alien 8900 everything works as expected. The 8900 is currently on HDMU 11842 but the Alien 2 has been moved to PKT Hyperion V3 which doesn't exhibit this problem so I can't (at the moment) provide any more detailed information.

Andy