Preview Icons Not Showing

Does anyone know why .jpegs on my desktop aren't shown as preview (picture) icons? The default application to open them is Preview and in Show View Options, I have Show Preview Icon checked. If I look at the desktop through Finder it shows the picture icon (not in column or list view though). The thing is, if I open those pictures in Photoshop and then save them in the same place under the same name, the picture icon then shows up on my desktop. I'm sure this problem occurs at other places but the desktop is the only one I can look at without using Finder. Any ideas?

do you mean the thumbnail? thats cause images from online or other sources won't usually include thumbnails, but photoshop saves a thumbnail preview.

Easy Fix

Double click on your HD icon. Click on VIEW - Then "Show View Options" - click on "All Windows & Show Icon Preview"

done.

Well, I had this problem last night, wondered in forums to find a solution but was unsuccessful (Even replacing all the .plists in ~/Library/Preferences by the ones of a new account), the only way I could get it back was doing the following:

Created new account, tested it and the previews there appeared, so I opened /Users/(Name old Account) and changed the permissions of the entire folder & contents to (staff=Read / Write), then manually backed up all the plists in ~/preferences, the Application Support folder, Safari and Keychains, and the folders where I had files like Pictures, Documents, Downloads, Desktop, Dropbox (I did copy them because I hadn't have many things on them, if I changed the permissions I guess it would let me just move them, which would be faster), so, next step was deleting my account from System Preferences and recreate it after, login to it again and put all folders back to their places, repair permissions and done. My account was again the way it was, with mp3 icon previews!

I know it isn't a good solution, but beats the crap out of formatting again to solve this!