SCApoints and MuMetal arrow bugs are fixed now.
Get it here:
http://www.tesnexus.com/downloads/file.php?id=27949
There is a new Texture for the Mumetal special effects. So be sure to do a full install of all the support files.
Before, if the target had a low magicka you would not see any effect from the MuMetal arrow. Now there is a low
magicka effect shader so you know the arrow disrupted even small amounts of magicka.