The TalkBack issue on the Galaxy S4 is not just limited to LightFlow, but any app that needs to use Accessibility Services, including some DashClock extensions. Pretty annoying ,especially because I had no idea why the stock browser was reading things aloud even though the TalkBack setting was off, and spent a bit of time trying to figure out what was going on. Never owned a Galaxy S3 previousl, but the fact that users are saying the same issue was on the S3 previously and Samsung fixed it, you would have thought the issue couldn't possibly rear its ugly head again in the Galaxy S4, but yet it has. I hope Samsung comes out with a fix for this soon.