Q: OSX Lion, Graphic Artifacts

You should wait for Apple to aknowledge this as a software/driver problem and wait for the system update. Or, if you like getting a new iMac every day, go ahead and replace it again.

yes I'm angry about this because you are right: I will get a new machine with the same problem and again and again and again....

Yes, you'll have the same problem with new ones as it is a software problem, not a hardware one.... Install 10.6 and your problem will dissappear. That said, patiently awaiting a software update from Apple myself.

Same issue on my brand new i mac same as yours

yes, you are right. the problem is still there in finder, but it's less frequent. maybe in 10.7.2 apple will get it right.

Well, I can reproduce the artifacts almost 100% of a time when watching flash videos on YouTube and switching them to and from fullscreen couple times. So, my assumption flash is the culprit... as always...

Same thought here.

I don't think it's just flash. I got it from previewing a video file via Quick Look.

Usually I would restart the computer whenever I got it, but it seems putting the computer to sleep and waking it up clears the artifacts.

My 2GB 6970M iMac didn't get the firmware update. I'm on the latest developer build of 10.7.2 and I still get the artifacts issue which kicks off when I watch a HD Youtube video.

Disappointing, for how long will this bug do un-noticed?

A new build of 10.7.2 just came out. No issues YET. It seems like slowly I'm experiencing the issue less and less with each build. Will update if I get the issues again.

I will share my 4 week adventure with lion and my new iMac..

I am a new mac user, and purchased a iMac 27" 1T 1GB GPU system.

Worked flawlessly with my aftermarket OWC 16GB RAM kit in SL.

Upgraded to lion and had a number of issues with the OS interface and video display.

• Funky patterns on the finder and desktop - greyed out interlaced icons / thumbnails
• Video from 5Dmkii (h.264) would play with filickering pink horizontal bars
• Kernal Panics
• Compressor taking a very very long time ot render video files
• Black screen with rainbow wheel after wakeup

I had my system recalled for the "seagate 1T HD issue" and replaced. Still the same issues.

I had my system bench tested by apple and Beyond the box (aurthorised repairer) and the hardware checked out fine.

I could replicate the issue always, videos would always flicker green / pink.

Apple icon on the top left bar would grey out once clicked.

Finder windows become greyed out momentarily when moved from one display to the other.

I when through the chain of apple care reps right through to senior staff, no fixes thus far.

I have had my machine replaced twice. And aftermarket RAM replaced twice.

I put the stock 8GB apple ram back in my system and that improved my video and graphical issues by 80%

Then I replaced my Aftermarket OWC RAM with OWC "Samsung Chips", and that is on par with my stock apple RAM - in terms of experienced issues.

Updated Lion many times including a squeaky clean manual install and that made no difference.

It seems the only improvements I could gain was to run SL or Lion 10.7.1 with stock RAM and OWC Samsung chip (part: OWC1333SAM3S4GB x 4)

I still have issues right now, but they are less occouring.

I do however get the awake issue from sleep mode still.

Im exhausted!

An update: Updated to the latest developer update a few days ago and everything was good for about a day. Problem STILL hasn't been fixed.

I have a Late 2006 iMac 24in C2D 2.16.  I was expiriencing extreme (to the point of unsuable) artifacts, freezes and other problems.  I figured it was probably one of the new "features" and suspected Mission Control.  I was using Spaces before going to 10.7 and it seemed to happen switching from Mail to Safari (which I used to keep in separate Spaces).  I turned off the 'Show Dashboard as a space', 'Automatically rearrange spaces...' and 'When switching to a new application...' Mission Control System Preference radio-buttons. 

Now I do not have artifacts at all and it seems to be running very well.

Why you have posted this problem in Lion section ? Your OS is SnowLeopard .

Negative Siamack.  My OS was SnowLeopard, I upgraded to Lion and was given video artifacts that seem to stem from Mission Control (an integral part of Lion if I am not mistaken).   I was offering a fix for others with problems... turning off the three mission control features I mentioned minimizes the artifacts and makes my system usable again.

I have to agree with a lot of posts here, this is one of Apple's worst releases.