Hello,
I play as a Sith Pureblood on the newly formed Star Forge server and I have had this problem many a time before I finally decided to make this report.
When I use the respirator mask from my Juggernaut Renowned armor set, my tendrils clip through the mask. I use head type 4 which has the bottom tendrils pointed.
I have provided some screen shots to show.
http://puu.sh/ynYht.jpg - Tendril Clipping
Thanks, I hope you are able to fix this problem relatively quickly because it makes the mask unusable. That is for me at least, haha.