I am still working on this issue.
Let me rephrase this in a more general way to see if that might help in tracking down the problem I am having. Is there a setting (or settings) somewhere in the Photopost Pro script that determine how much the uploaded images are compressed during watermarking?
It seems to me that the problem here is that I am using jpgs that are compressed at level 80 with Photoshop, but when the ImageMagick adds the watermark, it is compressing them more than the original. Is there somewhere in the code where I can adjust how much the large size photos are compressed during watermarking?
I just checked one of the watermarked images in a graphics program and it shows they are compressed to "66" instead of the original "80" that the file was before I uploaded it.
I need to figure out why the script seems to be compressing the jpg files to 66 and change it to compress only to 80.