Bright pixels near bottom edge of output image

[Dllu]

In many panoramas, I noticed an erroneously bright bottom edge.

I am using Hugin version 2014.0.0.5da69bc383dd

The bug is often accompanied by strange black horizontal dotted lines.

Example 1:

https://upload.wikimedia.org/wikipedia/commons/archive/2/29/20150609065757!Capitolhill_panorama_1.jpg

The original seven images used to stitch the panorama are available at: https://commons.wikimedia.org/wiki/File:Capitolhill_panorama_1_frame_0.JPG

Example 2:

https://upload.wikimedia.org/wikipedia/commons/archive/4/4e/20150623025822!Hurricane_ridge_panorama_5.jpg

My workflow is:

1) Add images
2) click "Align" in the simple UI
3) straighten and center the panorama in the simple UI
4) click "Calculate Field of View" and "Calculate Optimal Size" and "Fit Crop to Images", in that order, in the Stitcher tab of the advanced view.
5) click Stitch!

This is an exceptionally annoying bug because the defects are so subtle, and yet they ruin the image when it is inspected carefully or printed.