I never get it on normal TV or Bluerays. I do get it when watching DLNA slideshows for more than an hour or so. It's supposed to be a "smart" tv. It's more of a smart-alec tv. When watching moving slideshows via DLNA surely the software can figure out that I don't want it to stop? I can turn the feature off in the settings but that comes with warnings of doom and gloom.