Neither on heavy app? On slimkat it's happening fewly, but sometimes it does...
What about wifi theter? i tested old version and don't remember if it was working :P
on heavy apps it does create issues with Keyboard and back button sometimes. Its very random and does not happen all the time. But I like this KK build more than the other. It is very lag free and responsive.
As for wifi tether, I've never used that feature so not sure. Maybe some other members can suggest?
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?