http://bugs.winehq.org/show_bug.cgi?id=29871
--- Comment #11 from nockdown knockdowncore@gmail.com 2012-12-30 14:52:53 CST --- add:
The problem is not only on the brush, but on every tool where you need to keep the left mouse button pushed.
But with graphic tablet this bug doesn't occur, so I think it is connected only with mouse.