convert -size 256x256 gradient: -rotate 90 -solarize 50% -level 0x50% grad_solarize50a.png
![Image](http://www.fmwconcepts.com/misc_tests/solarize_bug/grad_solarize50a.png)
convert -size 256x256 gradient: -rotate 90 grad.png
convert grad.png -solarize 50% -level 0x50% grad_solarize50b.png
![Image](http://www.fmwconcepts.com/misc_tests/solarize_bug/grad_solarize50b.png)
convert -size 256x256 gradient: -rotate 90 grad.jpg
convert grad.jpg -solarize 50% -level 0x50% grad_solarize50c.jpg
![Image](http://www.fmwconcepts.com/misc_tests/solarize_bug/grad_solarize50c.jpg)