Clinton, I'm experiencing what sounds like the identical problem (running Mac OSX 10.6.8) ...

- It happens with .jpg, .png, .tif,.psd and Photoshop .pdf files - and therefore is not related to alpha channels

- No other app on any of the Macs in our shop, running either Snow Leopard and Lion has - or has ever had - this problem

- Re-opening the files and re-saving in the same format using any other graphics utility (Preview, Graphic Converter, AND Photoshop CS4! creates the icon successfully.

- Deleting the .DS_Store files for any given directory does not eliminate the problem

- Repairing disk permissions does not eliminate the problem

Only thing I haven't tried yet is rebuilding the entire volume in DiskWarrior - that is next.

I created 7 identical copies of the same stock photo in different file formats (.tif, .jpg, png, psd, .pdf) - Only #6 (re-opened in Preview and re-saved) and #7 (saved in Illustrator CS6) are displaying file icons.

Would love some real help from Adobe on this...

UPDATE TO THIS POST

Deleting the .DS_Store files for directory and restart appears to solve the problem...

Message was edited by: jeff@seaver.com

Thanks, Chris - apparently PS6 is very sensitive to OSX caching for thumbnails. I've had to use a utility to clear out the display settings for pretty much my entire hard drive, and after a restart, the icons are being created correctly. Unfortunately, I had 600GB of content with hundreds of thousands of folders, so it's a pain to have to do this. As I mentioned earlier, no other app in our Applications folder creates files with this problem (and I have over 350 apps installed) - and in fact none of the other CS6 apps I tried fails to create icon previews either.

A good utility for clearing DS_Store files en masse is Onyx. I also think Snow Leopard (aka Lion) Cache Cleaner does this.

Please read in context of previous posts - I'm speculating that the problem of PS6 not creating icon thumbnails, while it is being blamed on Apple's OS, it is the only app we own having the problem of saving new files that don't have thumbnail icons - and that this may imply that PS6 doesn't "play well" in the sandbox with the way Apple's OS caches (stores) the files that govern any given directories' appearance. Hope that's a help - and if you're not having the problem, congratulations and no need to worry about it! :-)

My confusion regards your use of the word "sensitive". I would imagine that it would be OS X/Finder that is sensitive.

I have read the context of these posts and that is why I asked for clarification on what has not yet been described.

Are you writing icon previews with Photoshop or are all previews being generated solely by OS X? ( Photoshop Preferences->File Handling->Icon ) What happens when you toggle this? When you did your test for (.tif, .jpg, png, psd, .pdf), did you use Save for Web on JPG/PNG?

Chris Cox had it right - clearing out the appearance settings solved the PS6 thumbnail icon issue for me.

Every folder on a Mac for which one has established a specific appearance (View>Show View Options, or Cmd-J) creates an invisible .DS_Store file within that folder, aka directory. It's not much fun to try, one at a time, to a) make them visible, and then b) trash them -  as there can end up being thousands.

There are several utilities that can batch remove these files - I used Onyx for Mac. I think File Buddy may also do this, Snow Leopard (or Lion) Cache Cleaner may have this capability - suprisingly, Mac Pilot didnt seem able to). There is also a Terminal command to perform this on an individual folder (directory), but I didn't know how to batch run it to clear out every directory on my hard drive, so I used my utilities to do so. Once Onyx was done removing all the .DS_Store files on my hard drive, I restarted and voila - Photoshop CS6 now saves every file with thumbnails that can expand from 16x16 to 128x128 (and on up, depending on your OS).

It does require that you re-set appearances on certain folders (icon view for folders of images, date-sorted lists for versioned documents, column view for for fast scanning of nested hierarchies, etc.

I couldn't find an option in Onyx to delete .DS_Store files. Would you know where it is. Here is a screenshot of the program.

Thank you in advance.

Marc

Sorry, it's not that obvious....

I'm running 10.6.8 and Onyx is OS-version-specific so there "could" be small variations if, for instance, you're in Lion.

Launch Onyx

Go to Maintenance heading

Click Rebuild tab

Third radio box down is √ Display of folders' content

Use the Select button at right and choose your hard drive (which is, effectively, / on the path)

Enable the "This folder and all its sub-folders" radio button

If you don't want to mess with all the other rebuilding options, DE-select:

LaunchServices

dyld's shared cache

Spotlight Index

Mail Envelope Index

Sidebar of Finder windows

Help Viewer menu

Click on Execute button lower right

Requires a restart to see results, but open PSCS6 and re-save or create a new image file to the desktop - let me know if it works for you too.

Thank you again Jeff.

Marc

As Mac OS X is responsible for writing the .DS_Store file, this would be an Apple issue.

DS_Store is not growing. It is just corrupting. DS_Store tells the system whether it should display icons and at what size. There is no indication that this file actually contains image data or anything that would grow.

Deleting/refreshing DS_Store only treats a symptom. The problem is with some OS X process corrupting these DS_Store files. So it is probable that the issue will happen again.

I used the program DS_Store Cleaner and I am seeing the icons for the files in the finder but within Photoshop when I select open the icons are missing. See screenshot. This either means the program I used didn't do the trick or it's PhotoShop or it OSX Lion. Either way I wonder if I should now use the program I was originally suggested to use, OnyX

After running OnyX as suggested all my icons in Photoshop open command are very tiny? Any suggestions on how to get them larger?

Okay, I have tham same problem but in a diffrent way. I'm working on two computers, one older Mac Pro running Tiger with Adobe cs4 and a new Mac Pro running Lion 10.7.4. running Adobe cs6. Both computers are on a large Xsan so I'm saving files to the same folder on the Xsan from both machines.

If I create a Photoshop file (any- jpg png psd tiff. etc....) I can see the preview icon in a folder on the New Mac but when I open the same folder on the old Mac I can't see the preview icon

See example:

I don't want to blame Apple or to blame Adobe. I don't care to blame anyone.

I'm interested in is a solution or a work around. Deleted the .ds_store didn't solve it for me the problem returned the next day.

If anyone has any good suggestions please let me know.

PS. Chris do you know if Adobe is in discussions with Apple about this problem and when we might see a fix. Thank you.

Is there anything from my system that I can privately send to you to help you evaluate the problem.

Okay.... I did another expariment..... In the new Mac Pro I saved the same photoshop file in version 5.1 and I see the preview in the old Mac Pro