2 weeks running ts10, I started seeing some occasional multitouch issues. So I grabbed a multitouch test app from the Play store and was able to clearly reproduce my issues in the test app.
I just applied the ts20 file and could not produce any issues in the test app. Will see how it turns out after some time.
After 1 day of running ts20, I noticed if the tablet was sitting on carpet or bed and I touched it with just one finger the touchscreen would not respond. I had to hold the tablet in my hand (or plug it in) for a normal touch response. What the hell is going on with this capacitive screen!? Seems like a grounding issue. A reboot seems to have almost entirely alleviated this issue... but for how long? Most people in this thread seem to recommend ts11. Giving that a try right now. So far... it seems slightly worse than ts20.