As far as I am aware, this still works -- I used this late last year to get a temple chestpiece on my necromancer. Don't have a screenie for you, but the basic process is still the same. There was a post somewhere on the forums a while ago with the steps, but I cannot recall where.
Here's one from the official forums.
You'll need a Fine Transmutation Stone for the first transmute (since Orr temple armor is level 80), but as long as the white/blue piece used is less than level 80, you should be able to use a regular Transmutation Stone for the second transmute. Also, be aware that you can only use this method to save the skin and, if you want, the superior rune. It will not work to save the inherent stats from the temple armor. Of course, if the armor piece for the second transmute is less than level 60, the rune won't transfer anyway.
Malganis, on 11 February 2013 - 09:40 PM, said:
I was able to transmute Order's armor that was bought on my OoW necro to my Vigil thief, but I was not able to transmute Orr Karma medium armor I accidentally bought on my necro. It stayed soulbound. This was early in january that I last tried. Your results may vary, as thartalion said above.
Not certain if you are saying that you tried to transmute medium armor onto a light armor profession (will not work) or if you were unable to transmute medium armor purchased BY your Necromancer for your Thief to use? If the latter, which of the 3 armor "parts" did you transmute? Transmute stones allow you to carry over up to 2 of the 3 parts from one piece with one from the second piece -- either A) skin, B ) inherent stats, or C) rune. For transferring otherwise soulbound armor from one toon to another, only A and B will work to make the final piece "account bound" for the transfer. If you tried to carry over the inherent stats, the armor stays soulbound.
Edited by Meow Ren, 12 February 2013 - 12:53 AM.