Graphical issues with 2011 iMac and Lion

Today, I have been watching 720p and 1080p on Youtube and Quicktime without any artifacting or graphic corruption. The only difference from when I had issues was last night I installed the Security Update from Software Update. http://support.apple.com/kb/DL1447.

Did Apple sneak in a fix in a security update as not to acknowledge or make known that there was an issue?

I am having a very similar issue on my 27" iMac (3.4 GHz i7, 16 GB ram, Radeon HD 6970M w/2 GB) running 10.7.1. Really hope this gets addressed soon rather than later.

Can anyone else confirm the issue being fixed after the 9/9/11 Security Update? After the Security Update was installed I haven't had a problem viewing HD videos on Youtube, QT, and iTunes. No more artifactign or graphic corruption.

Yesterday 9/10/11 was the first time I experienced this issue, which comes after the 9/9/11 Security Update. I don't think the Security Update addressed this issue in any way, nor did the 10.7.1 update.

Bummer.

I've had the issue with two 2011 iMacs 3.4ghz/4gb/256ssd+1tb/6970m 2gb since 10.7.0. 10.7.1 only fixed the freezing issue. Ever since the Security Update I don't have the graphic issues anymore. I haven't installed or uninstalled anything besides the Security Update.

Had the issue again today. Same as the screenshots I posted earlier. I haven't yet installed the security update so we'll see if that resolves the issue. Again, this is a 27" Core i7 iMac with a 6970M 2GB.

I looked in the security update package and I don't see anything related to video driver or any other change that would possibly fix this issue. It is an intermittent problem so probably just luck that it has not happened since.

It wasn't an intermittent problem with me. I was always able to prodcue it by playing HD vids on Youtube (using Google Chrome) or on Quicktime. I know the Security Update doesn't say anything about the video issue, it shouldn't since it's a "Security" update. But it wouldn't surprise me if Apple snuck in a fix with it because they don't want to acknowledge it.

What I meant is I literally looked inside the security update package. All it is are some certificates and other files to do with recent fraudulent certificates.

Following are the files it changes:

/System/Library/Keychains/EVRoots.plist

/System/Library/Keychains/SystemRootCertificates.keychain

/System/Library/Keychains/SystemTrustSettings.plist

There is nothing in this update that I see which would fix anything to do with video glitches.

I don't know what fixed it then. I've been randomly playing HD vids since yesterday and not a single issue. I don't have sleep disabled either.

Spec: iMac 27 i7 16gb 6970m 2gb

After going back to Snow Leopard 10.6.8, I'm having NO problem at all.

I'm still getting this issue on the latest developer build of 10.7.2 so don't expect a fix in that! I'm on the 2GB card as well and really don't know what to do other then go back to Snow Leopard which I'm not willing to do. Am I within my rights to ask for a refund? Was thinking of making my own PC anyway.

So, I finally got an update from Apple "Engineers" from Apple Tech Support handling my case:

"I got a response from them today. I just tried calling but got your voicemail. It appears that you have 3rd party RAM added to your system. This is likely the cause of your issues. We would like to test with the Apple RAM only, and all 3rd party products taken out of the computer."

Thing is this is the 2nd 2011 iMac. The first one didn't have 3rd party ram installed. This 2nd iMac had issues before I installed the ram. Apple seems to want to put blame on 3rd party ram and apps. The 1st iMac was tested without 3rd party anything.

That's a stupid answer of Apple, i have original Apple RAM, i have the same problems !!!

Have any of you had your issues addressed by Apple?

I also had another iMac with no 3rd party anything and had the issue. But all iMacs are unique like snowflakes.