Differences in GD2 watermarked images quality in RC2 and RC3
Some users complained about significant differences in image quality between the beta site (RC2) and live site (RC3). So I've been doing some tests to see why the image quality dropped and found some disturbing results.
I use a small transparent 24bit PNG in the bottom right corner as a watermark.
The first and most important issue is the image quality after watermarking with GD2. A close inspection reveals lots of jpeg artifacts (mostly dots and texture like tissue) even with unchanged quality setting (-1).
So I tried several quality settings and there wasn't any difference between the images.
Just to be sure, I turn off watermarks and uploaded a few "big" pictures to test just the resize and not the watermark.
Conclusion is that changing settings works on RC2 but not on RC3.
Can anyone confirm?