The latest version of f.lux screwed up the color and text on my phone. I'm on 6.1.2. I've emailed the dev about this. He says Dimmer might cause problems with it BUT....I've always had dimmer and I've NEVER experienced any problems whatsoever until I upgraded to the latest version of f.lux. I should have never updated it. I NEVER update anything, but then I updated this and it screwed up my phone. Should have just never updated. I had to uninstall f.lux. Then I had to search the internet for a deb file from a previous version of f.lux. What a pain in the a&$.