Hi I have read a few posts about this. When using Safari I get real slugginess and graphic glitches, however this happens system wide. Its really beginning to be quite annoying. I had a cMBP 2012 and Safari was bad on there too. My question is, is this something that can be fixed by a software update and does anyone know if this is being address in 10.8.3? It really is very noticeable. Thanks.