Some files in webkitgtk's source are executable, which is not needed. In the source files shipped to fedora this currently affects Source/WebCore/html/canvas/CanvasRenderingContext2D.cpp Source/WebCore/mathml/MathMLMencloseElement.cpp Source/WebCore/mathml/MathMLMencloseElement.h Source/WebCore/rendering/mathml/RenderMathMLMenclose.cpp Source/WebCore/rendering/mathml/RenderMathMLMenclose.h