Red screen edges used to mean I was dying & to drink run or pop defense skill.
NOW in 1.2 I see it during stopping the Loghorrean for 3-4 MINUTES & I was taking NO damage!!!
IS this a bug??
I am running a 78 Commando with only 1175 health regen before overguard etc being used.
BUT why when I am in no apparent danger does it flash? And BOY does it stand out to me now!!! Nice job!!
Sundered debuff that was added with 1.2
that would be quite the feat 
sunder debuff
hence why i’m doubting the claim it was for 3min straight while taking 0 dmg 
That’s one of my problems with Sunder too. Before 1.2 we only had one border effect - red edges when we were about to die, so it was important. But Sunder is just like any other curse. Sometimes deadly, but often negligible, so its border effect is an overkill.
Yep I didn’t drink one potion, albeit my lil’ tank had 2.4k health regen without buffs.
…so what does Sunder mean?
It’s this curse in bottom-right corner.
Some bosses can cast it upon you. While it’s active you receive X % more damage.