Netflix has updated its Windows Phone app today, but the new version, unfortunately, doesn't come with a change log (the one listed is actually an older one). This would suggest this download is a minor patch for bug fixes only.
The new version number for the Netflix app is 188.8.131.52 and it's an 8MB download.
A number of Windows Phone users have been reporting that the app has had some video playback issues lately, so perhaps this update is going to fix those problems. Let us know if you see any improvements in the app after you download and install the update in the comments.
Thanks to Sami for the tip!