Hello, I finally got myself to give a shot to Krita on my surface Pro 2 and I have to admit I'm blown away: it's blazingly fast and the brush engine is simply wonderful.

However, I'm having a slight problem as sometimes I got stray strokes appearing on the drawing, which are ignored by Undo.

I think it happens when the system switches from hand to pen input, as they are straight lines coming from the edge of the screen.

I could probably live with that if it was possible to undo that, but so far I managed only once, drawing another line on top of it and both got undone. But it doesn't work every time unfortunately.