My 3d targetting ring has suddenyl stopped working, and for the life of me i can't figure out why. It's turned on in the options menu. Anyone got any advice/suggestions?

If you use a custom UI, make sure you have the two files for the ring copied to your UI directory as well as the default location. The files technically aren't a part of the UI, so it won't fall back to the defaults if they aren't found in the UI folder at startup.

also try /indicator on

I had this problem too I was on in my options but that commaned kicked it in for me...