http://bugs.winehq.org/show_bug.cgi?id=35179
--- Comment #3 from Vincent Povirk madewokherd@gmail.com --- If native gdiplus fixes it (which apparently no one has tested in this case), it's a gdiplus bug, even if dotnet also fixes it. They both contain independent implementations of winforms which use gdiplus differently, so it's not at all strange for only one implementation to suffer from a gdiplus bug.