Can someone explain to me the whole bugged armors deal?

[Raylek]

I've used the search function, but cannot find the answer to this question...

Thanks for any help

[theheft]

Find an etheral armour (auto +50% Def) socket it using the cube and get an extra 50% def, effectively doubling the base def of the armour....make runeword in said armour, stick on merc.

[Raylek]

Ahh ok, I get it. Thanks :D

[Neuuubeh]

its not just a 50% increase of the base, its a 50% increase of the defense including the first ethereal 50% bonus.
a 700 def eth one would become 1050 when bugged. 750 would become 1125 and so on. This is how sacred armors can get 1300+ def (up to 600 on plain white, so 900 ethereal, 1350 ethereal bugged)