I hope a fix for this is still incoming... I'm still waiting to continue that Doombringer. It seems like it ought to be such a minor thing, but it's actually really demotivating playing with broken graphics. I know I could just avoid the using that particular sustain, but then I'm being forced to drastically change my build just to work around a silly issue that shouldn't even be there. I was actually really looking forward to the last patch, hoping it would fix this, and got very disappointed when nothing changed.
