[mythtv-users] Playback scaling functionality removed in 0.22?

[scram69]

Going back several versions of Myth, I have set the
"Vertical/Horizontal scaling" parameter on the second page of Playback
Settings to +1% to get rid of the little white blinking lines that my
cable company likes to provide at the top of their feeds.  However, in
0.22, this settings parameter no longer seems to be functional.  I
have even tried setting both Horizontal and Vertical scalings to
ridiculously big numbers like +/-25% and see absolutely no effect on
the size of the playback image.

Just to confirm the scaling settings on the page were saved, I checked
the frontend log with -v playback:
2009-11-17 20:39:03.032 Main window: Viewport is 1360 x 768
2009-11-17 20:39:03.032 Main window: Image is 1920 x 1088
2009-11-17 20:39:03.032 Main window: Scaling to 0.708333 x 0.705882 of original
2009-11-17 20:39:03.038 Over/underscan. V: 0.01, H: 0.01
2009-11-17 20:39:03.038 Display Rect  left: 0, top: 0, width: 1360,
height: 768, aspect: 1.77778
2009-11-17 20:39:03.038 Video Rect    left: 19, top: 11, width: 1882,
height: 1058, aspect: 1.77778

Sure enough, there it is.  Only the playback image is _not_
overscanned.  Any idea why this setting would have been disabled?