Edited photos pixelated in cover flow preview...

I recently bought a Nikon D90. The images are pristine, but I like to correct the color of every picture I shoot using Photoshop CS4 and then import the corrected image into Aperture.
My problem is that when I correct the color using AutoLevels in Photoshop, and then view the image in cover flow, the preview is smaller and very pixelated. I'm able to open the photo in Preview, but the cover flow preview's quality is horrible. This was never a problem with image files from any of my previous cameras.
I've tried to see the differences between the specs on the two files, but can't see any. I'd like to understand why this is before I start making changes to all of the files I shoot with the new camera. My hope is that I won't create a bigger problem once the files are in Aperture.
Any help would be much appreciated.

I'm sure my workflow is far from professional. Aperture certainly does non-destructive editing, but I'm using it for cataloging more than editing. I've been using Photoshop longer and trust my skills with it more. However, using an external editor with Aperture results in the application creating a huge secondary edit file (I think it's a PNG file, but don't quote me). Rather than create that large unnecessary file, I'd prefer to import a file that I've already correct once. If I want to work with the image later, I export a new image from Aperture and work from there.
I'm shooting in JPEG (again, I'm far from professional). I don't know that I'm doing the right thing here, but I don't want my lack of knowledge to compound my problem by importing an image file I've messed up somehow.

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Does QuickLook work?
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Cover flow pixelation...probably a stupid question...

I recently bought a Nikon D90. The images are pristine, but I like to correct the color of every picture I shoot using Photoshop CS4, save the file, and then import the corrected image into Aperture.
My problem is that when I correct the color using AutoLevels in Photoshop, save the file, and then view the image in cover flow, the preview is smaller and very pixelated. I'm able to open the photo in Preview, but the cover flow preview's quality is horrible. This was never a problem with image files from any of my previous cameras.
I've tried to see the differences between the specs on the two files, but can't see any. I'd like to understand why this is before I start making changes to all of the files I shoot with the new camera. My hope is that I won't create a bigger problem once the files are in Aperture.
Any help would be much appreciated.

Holy cow! Hard to know where to begin. Let's see:
pete2864 wrote:
My problem is that when I correct the color using AutoLevels in Photoshop
Using Levels to correct the colors is like using a chain saw for brain surgery. Using Auto Levels is like operating that chain saw while wearing heavy boxing gloves.
You should learn how to use Curves or, these days, correct the colors in ACR (Adobe Camera Raw), usually a one click operation as long as you have one neutral area in your image (like a gray card).
Are you shooting raw or JPEGs? ACR can correct JPEGs too.
pete2864 wrote:
…and then view the image in cover flow, the preview is smaller and very pixelated.
I'm not sure what Cover Flow does. Sounds like it—whatever kind of Apple gimmick it is—is using an embedded preview.
What exact versions of Photoshop, the OS and ACR are you using?

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Hoping for any suggestions.
I have seen articles about using terminal to adjust "flow height" but never anything substainial that seemend like an informed solution.

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Cover Flow in Finder (Not Showing Photo)

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HI,
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com.apple.finder.plist
~/Library/Preferences.
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Hi
I previously posted this question which got moved to the iPhoto section, but its NOT an iPhoto issue: http://discussions.apple.com/thread.jspa?threadID=2619921&tstart=0
Having purchased a new camera (Sony DSC2000) the first time I used it the photos were fine...now ever since they appear intermittently distorted, or missing altogether. I tried creating a basic new user account as a test with the same results. Help!!

Hi
Thanks for the tip. Yes the problems happen regardless of the location or user account. As an example when opening the jpegs in Preview the log shows the following messages repeatedly:
Macintosh.local Finder[115] <Error>: CGImageCreate: invalid image size: 0 x 0.
10/12/2010 18:59:10 [0x0-0xb00b].com.apple.finder[115] Fri Dec 10 18:59:10 Macintosh.local Finder[115] <Error>: CGImageCreate: invalid image size: 0 x 0.
10/12/2010 18:59:21 [0x0-0xb00b].com.apple.finder[115] Fri Dec 10 18:59:21 Macintosh.local Finder[115] <Error>: Corrupt JPEG data: bad Huffman code.
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Macintosh.local quicklookd[727] <Error>: Corrupt JPEG data: premature end of data segment
10/12/2010 19:25:22 com.apple.quicklook[727]
10/12/2010 19:25:24 com.apple.quicklook[727] Fri Dec 10 19:25:24 Macintosh.local quicklookd[727] <Error>: Bogus marker length
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http://www.apple.com/feedback/macosx.html
Message was edited by: Ravenkeeper

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http://dl.dropbox.com/u/5217556/1.jpg
http://dl.dropbox.com/u/5217556/2.jpg
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Message was edited by: gfann18

Edited photos pixelated in cover flow preview...

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