AutoCAD 2013 :: DIMRADIUS Line Extending Beyond Tangent Point

When inserting a DIMRADIUS in older versions of AutoCAD, the extent of the radius dim used to automatically stop at the tangent point along an arc. However, now in ACAD 2013 (and possibly other recent versions), a red 'extension' line is carried on beyond the tangent point, which I don't want. Is there a toggle that switches this off so that the radius dim stops wholly at the tangent point as before?

I've tried using endpoint snap to stop the dim at the tangent point, but the radius dimesion text is then placed on the outside of the curve rather than the inside where I want it.