ARSD PNG memory usage

[Joerg Joergonson via Digitalmars-d-learn]

Also, for some reason one image has a weird horizontal line at 
the bottom of the image that is not part of the original. This is 
as if the height was 1 pixel to much and it's reading "junk". I 
have basically a few duplicate images that were generated from 
the same base image. None of the others have this problem.

If I reduce the image dimensions it doesn't have this problem. My 
guess is that there is probably a bug with a > vs >= or 
something. When the image dimensions are "just right" an extra 
line is added that may be non-zero.

The image dimensions are 124x123.

This is all speculation but it seems like it is a png.d or 
opengltexture issue. I cannot see this added line in any image 
editor I've tried(PS, ifranview) and changing the dimensions of 
the image fix it.

Since it's a hard one to debug without test case I will work on 
it... Hoping you have some possible points of attack though.