Jacqui Cheng (via Ars Technica) reported yesterday (how could we have missed it!) on the Windows Vista Media Center users who found themselves blocked from making recordings of their favorite TV shows this week "when a broadcast flag triggered the software's built-in copy protection measures."
Writes Cheng: The flag affected users trying to record prime-time NBC shows on Monday evening, using both over-the-air broadcasts and cable. Although the problem is being "looked into" by both NBC and Microsoft, the incident serves as another reminder that DRM gives content providers full control, even if by accident.