Images distort while editing

If you went from 10.6 to 10.6.2 I'd download and run the combo installer just to be on the safe side. The combo installer will include all that's in the previous installers for that system version but the standard installer will not.

I've got the distortion when editing photos too. I'm rebuilding my library now with iPhoto Library Manager, and downloading the OSX update. And I sent some iPhoto feedback telling Steve Jobs I would throw myself off a building if he didn't get it fixed soonl. Thanks for the tips.

I've also noticed the green monster distortion in iMovie. Not when editing, sometimes it just shows up on my thumbnails even when I have done nothing to it. The video plays just fine though.

I just installed the combo update to try and fix this. Guess what? It didnt. I have had my MacBook in at the Genius Bar twice before I saw this discussion and the Genius Bar in Sydney didnt have a clue.
All they did was reseat the ram twice. I'm going to Thailand next Tuesday intending to take this MacBook to process photos along the way to post online. That will obviously be a waste of time.
I'm very unhappy with this. Not a very  experience at all.

I may very well join you in jumping off that building at the moment!

Same issue here!
Tried everything mentioned in this post (deleting .plists, rebuilding library) and nothing helps. Everything was fine until Snow Leopard and I was hoping that it will be fixed in 10.6.2 but it isn't. I am pretty sure the problem is in graphic drivers, I have white 20" iMac with Ati x1600 graphic card and someone already mentioned it in this post. That old radeon is not supported in new OpenCl so Im assuming that is the issue but Apple should fix it!

I too have this problem since installing SL and it's REALLY annoying!

iPhoto, Preview, and Aperture are all affected.

I'm running an old Intel MPB with an ATI card. Come on Apple, get this fixed!

Another 'Me too' I'm afraid, MacBook Pro 2.16 10.6.2 Radeon X1600 with external monitor. Sometimes using the 'shift' key repeatedly might make one picture show correctly, but most of the time it's that darn distortion.

Count me in too. Same problem on my iMac CD with ATI card since my upgrade to Snow Leopard. Sent a bug report to Apple yesterday. I made a clone of my iMac´s hard drive to an external HD and started my macBook Pro with that disk. No more distortion on my pics. Since it´s the same iPhoto library as on my iMac, it seems to be related to the hardware, i.e. the graphics card/driver.

Apple, please help!!!

Yep. I did this. Hope Apple will do something about the issue, since other users reported the error before and nothing happened.

As mentioned above by smiff, pressing the shift key might help, but you will see only the unedited image.

"As mentioned above by smiff, pressing the shift key might help, but you will see only the unedited image."

Not for me, sometimes the distortion disappears from the edited image. The same sometimes occurs when continually dragging sliders, though this is less frequently true.

I have exactly the same problem (images become distorted while in full screen editing mode, just like the posted screen shot in the first post).

It started since I upgraded from Leopard to Snow Leopard, using iPhoto 09 (8.1.1). I tried reinstalling iPhoto and the iLife Support 903 update, but the problem persists.

This issue has clearly been caused by the 10.6 upgrade, I never had anything like this before.

I've been having the same problems for months. I cannot show friends my photos as a slide show anymore because do many images - especially edited ones (particularly those with highlight or shadow compensation) just degenerate to red/green fuzz with a diagonal stripe.

Seems like later models (with Nvidia graphics) do not suffer with this problem, so perhaps Apple is sitting-back and waiting for the problem to subside. Not very responsible really given what we paid for our hardware and the fact that it is still perfectly capable in almost every other respect.

I wait in hope that a solution may yet be found.

I've been having this problem too, ever since upgrading to Snow Leopard. Aside from the fact that it always happens in Full Screen mode (my preferred way of working with iPhoto) it's completely erratic and unpredictable. Sometimes the weird distortions go away if I wait a few seconds after opening in full screen mode, other times they persist. It occurs especially often after I've straightened a photo.

I've been trying to organize a lot of vacation photos today and am having so much trouble that I'm going to switch to Bridge until this is fixed.

I'm getting the same problem ever since I upgraded to 10.6

I decided to try installing 10.5 on another drive to test and didn't have any problems with any of the coreImage apps I was experiencing strange patterns with 10.6 (iPhoto, Preview, Pixelmator, etc.)

Could Apple please test the ATi Radeon X1600 driver with snow leopard?

Hey dropadrop,

I totally have the same problem - try to edit photo's in the new 09 version of iPhoto & they all go like that - & when i try HDR - forget it! all i get is grey stripes. Totally ****** me off!

Cause its the bloody software to be sure.
Rich

Exactly the same issues here, reported it via
http://www.apple.com/feedback/iphoto.html

(these forums aren't monitored by Apple)