Currently Being ModeratedApr 20, 2013 10:46 AM (in response to spookybathtub)
Yep I see it too. It just started after the update. I see it on my iMac running Mountain Lion and my Macbook Pro running Lion. Also appears on the mail app when you scroll the list of email. Not tearing when using google chrome browser.
Currently Being ModeratedMay 11, 2013 9:52 PM (in response to jpcanavera)
Someone told me to try this. Create a new user and sign on using that newly created user ID. See if the tearing still occurs. If not, the problem isn't hardware but something corrupted with the user preferences. I tried and found this true. No tearing on the new id, tearing occuring on the old. So where do we go from hear? I use time machine but I don't know what files are corrupted. Anyone have any ideas on the next step?
Currently Being ModeratedMay 13, 2013 12:35 PM (in response to jpcanavera)
The screen tearing did not occur on the new user, but after looking closely I realized that my free memory was higher as a new user. I have had issues since the last Safari update of Safari running very slow and finding I was pushing memory limits. I ran into a post from someone on another site who stated that the screen tearing was due to low memory. I had 2 gig in my Macbook Pro with a 3 gig limit. I decided to remove one gig and replace it with 2, so I'm now at the 3 gig limit. Interesting in that since this change, I'm sitting with 1.2 gig to 800 meg free, and the screen tearing has stopped. I've come to the conclusion that the last release of Safari increased its need for memory which put me on the edge. So to spookbathtub who created this thread, you might want to check your free memory. Mine was in the 200K mode or less when using Safari. You might just want to buy some more and see if the probelm goes away.
Currently Being ModeratedMay 14, 2013 6:53 PM (in response to jpcanavera)
My original problem happened on all webpages, when scrolling. That problem has actually gone away some time over the last 2 months, and I actually forgot about it. My new problem happens only when watching web videos full-screen. There is sometimes horizontal tearing, and sometimes full-screen flashes. I just checked the RAM usage, and it happens when I have more than 10GB free. I will try creating a new user later and see what happens.