I encountered an annoying bug in the “knife project” function.
When I “knife-project” a circle on a sphere, the cut-out is wrong.
See Attachment: sphere_001.png
However, when I shift the circle a little, so that the lines of the
circle and the lines of the sphere don’t match, the cut-out is
See Attachment: sphere_002.png
The Blender-File with the wrong cut-out is also attached (sphere_001.blend)
The Error also works with cylinders or other objects.
Blender 2.69 / Linux 64bit
sphere_001.blend (522 KB)