The Curse, or Noroi to give it it's Japanese title. I was surprised I'd never heard of this, I've always enjoyed watching Asian horror. This was decent enough, it's in the style of 'found footage' about a paranormal investigator type fella who is looking into a series of deaths which are linked to a crazy woman.
Apart from it's unusual (for this genre) length - it's over 2 hours - and the plot becoming a bit convoluted in the last 45 minutes, it's well worth a watch if you enjoy horror films that don't rely on cheap scares or blood and guts.