Somehow I gooned up the uploaded files to this week's episode. Even though my baseline file was right, the file that I uploaded had last week's scene in it. I've uploaded the correct file in to the page for this week's episode, but just in case I'm also uploading it separately, in this episode.
Real sorry for the mixup. Not sure how I did that. Obviously I must have made some changes and then forgotten to upload the revised/fixed file. Or something. Mea maxima culpa.
And seriously, thanks very much to Mondello Browner, who discovered the problem and was kind enough to email and tell me about it.