I couldn't find the other thread. Here's some advice from my Post Points from the Washington Post.
The idea of updating the software in a television may sound like a bad joke, but it's a not-necessarily-unpleasant reality of today's increasingly computerized home electronics. Manufacturers sometimes ship free updates that fix problems discovered in the field or improve performance--something not possible with a simpler generation of gadgets. But a high-definition television or Blu-ray player most likely can't look for an update in the way that a copy of Windows or Mac OS X could, so it's up to you to check. Visit your device manufacturer's Web site and look for a "support" link on its home page; in most cases, after clicking on that you can check for any available updates for your gadget by typing its model number or selecting it off a list. On TVs with a USB port, installing a firmware update can be as simple as copying a file to a USB flash drive, then plugging that into the TV (as I recently discovered with a Sony HDTV). For DVD or Blu-ray players, you may have to burn the updater file to a blank CD and pop that in to the player.
-- Rob Pegoraro, Consumer Technology Columnist