Noticed today, every time when I end session, exit game completly and log back Multisample Techniques stops working even when in Settings it’s set to x8. To work it back I need to first set Multisample techniques to x4 and back to x8. But after I quit the game and log back, edges are like Multisample would be set to None.
Edit:
Not sure but probably latest small update to ver. 64772 broke it. Yesterday was everything ok.
US forums reports:
Just confirming I have the same issue as of today.
Thanks , just noticed the same.
Not fixed after maintanance. Realy annoying, need to set Multisample Techniques from x8 to x4 press apply and then from x4 to x8 to get it work everytime when I start new session.
I have the exact same problem. Need to turn off and turn on MSAA every time I log. A permanent fix from Blizz would be great. Thanks!
Edit: Just noticed alt-tab for a bit breaks it again, and need to go to settings and turn off and turn on to fix.
Yeah…I have a same problem…. I hope they will fix it soon 
workaround :
msaa 4 - macro 1 :
/console MSAAQuality 2
msaa 8 - macro 2 :
/console MSAAQuality 3
if someone know how to script it(so it is one macro/click instead of two), please teach us
it should work when you put it in one macro as
/console MSAAQuality 2
/console MSAAQuality 3
but I am not sure
This is not fixed yet, why?
I don’t know why this taking so long to fix this and why we did not get any update about it yet?
Still broken after maintanance.
Hey there,
Let’s use the thread over in Tech Support for this:
No news on this yet, but we’ll update you there once we know more!