I have had a couple instances now where I recorded a few episodes of a show that were on back to back, and one of the recordings came out black. In one case it was a string of South Parks on ComedyCentralHD, and in another case it was a string of Big Bang Theory on TBSHD. The other tuner was probably also recording during these times. Has anyone else had this problem crop up? By black I mean there was 30 minutes of "recording", but it just played as a black screen with no sound all the way through.