If I open a folder that is set for large icon view, instead of getting thumbnails and folder previews, I get blank spaces with the file name under it...
Folder upon opening:

Now if I cycle through the various views - list, details, tiles, and back to icons - it will generate and display thumbnails ... but with two problems: (1) notice the folder images it just generated are smaller than they should be, and they are not showing any preview of what's inside the folder; and (2) the thumbnails for the jpgs are there only as long as the window is open and I don't navigate elsewhere. As soon as I leave the folder, they revert back to a blank space.
Folder after cycling through the Views button:

Moving to another folder yields the same results: no thumbnails:

And going back to the previous folder, and the thumbnails are gone again =(

Folder Options -> View -> Advanced -> "Always show icons, never thumbnails" is unchecked.
System Properties -> Advanced -> Performance Settings -> "Show thumbnails instead of icons" is checked.
I have deleted the thumbnails cache in Disk Cleanup. I also attempted a system rollback to no avail. Apparently this problem occurred prior to the earliest system checkpoint on my machine, but I don't know what I did to make the thumbnails views disappear.
Thank you for your time, and I appreciate any suggestions or advice you may have.
Edited by q1000101, 17 November 2008 - 07:49 PM.