This just started happening. The first thing you are prompted to do want to sketch something is select a sketch plane. Where you actually touch the plane with your curser should not matter, just select a plane. Then, start drawing. Now, for some reason, when I select a plane to sketch on, the line/point/arc automatically starts were I select the plane....during the plane selection. Example: Press MB to select plane, release MB and the line has started and is waiting for you to select the end point of the line. This is not good.