Wondows Movie Maker 2012 4:3 aspect output error

I recently upgraded to WMM 2012. Since doing so, my slide show WMM projects videos do not properly render a 4:3 aspect ratio when I burn to DVD. All the WMM previews and completed projects display the 4:3 aspect ratio correctly but when burned to DVD images are squished so everything looks abnormally thin and tall. Prior to the upgrade to 2012 version, all my WMM projects burned 4:3 ratio correctly. My source photos are 4:3 so it want to maintain this aspect ratio.