I was asked for advice about a problem by a Krita on Windows user: When he use Wacom tablet on Krita, Krita goes mad. I've never seen such a thing on my Krita, so I report it on the forum.
His PC:
OS: Windows 7 Home Premium 64 bit
Language: Japanese
Processor: Intel(R) Core(TM) i7-2860QM CPU @ 2.50GHz (8 CPUs).
RAM: 8192MB RAM
>a tweet where he says the above: https://twitter.com/THIS0PEPR/status/571721520747167746
HIs tablet: CTH-470/K1
>a tweet where he says the above: https://twitter.com/THIS0PEPR/status/571724487986573313
...and this is what happens on his Krita with his tablet (a video on twitter): https://twitter.com/THIS0PEPR/status/571714467219689472

Could be the usb cable across the top corner -- might cause an unwelcome electrical field.

Also is it touch sensitive? The palm on the tablet does sometimes cause problems.