Q: safari rendering issues

Hmm Ridiculous...

Disabling graphics switching completely solved this issue for me. Same as a problem I originally had when I first bought my mid-2010 MBP 15 in which I had lots of kernel panics and major display anomalies when graphics switching was enabled - that issue was eventually solved by a firmware update.

Well, I'm running a mid 2012 13" Macbook Pro. So turning off graphics switching is not an option.

Yes - agreed - but I didn't pay for a top of the line rMBP with dual display silicon for performance plus power saving only to have lobotomize it in order to use the manufacturer's own **** browser! I have to say that as a devoted fanatic of all things Apple I am really disheartened by things like this - and the terrible performance turned in by iMessages, the over-selling of Siri, the lack of transport info in Apple maps. It's starting to get to me.

Not just you...

Yes, I agree. I'm just saying that for me, it has solved the issue on an interim basis until there is a real solution. It was driving me up the wall, and at least I have a temporary work around.

I can confirm that the issue still exists after updating to Safari 6.0.2!

Yep. Been crap for me on a Mid 2010 17" ever since Mountain Lion. Shows mostly when I'm on facebook. After the last updates I thought it might be fixed but exactly the same. Came here to find a solution thinking maybe if I cleared out all caches and everything that might be the fix, but I take it from this tread it's more serious. How can a browser not reliably show one of the most used web pages on the planet for months? What happened to the QA department?

Same here. Specially Gmail, or Google's finance site. I get the deffect every day, a few times a day. Running latest versions of everything on a fully loaded Jan 2012 17" MacBook Pro. This is a software issue that needs fixing now.

Hoping this latest update for mid 2012 laptops yesterday does something for us - I have not seen the issue yet since I updated...

Agreed, I've just updated my 15" rMBP 2012. Still seeing the horrible issues, whole chunks of the screen being wiped over. If anythig, it's actually *worse* since the update. It's not just that it's not pretty, it actually makes websites unusable!

I have a 16GB rMBP with 512GB SSD, 2.6GHz Core i7, with nVidia GeForce GT 650M, just for info.

I'm seeing the problem on 15" rMBP 2012 too.  I've noticed it's worse when a site is using something like jQuery to futz with the DOM real-time.

Just an update; I'm not seeing the problem on my old 13" Macbook Pro (Mid 2010) - which is also running ML 10.8.2 and Safari 6.2.

Still seeing the issue after Apple's update for mid-2012 laptops

Yup, me too