I have a new Vista system (Dell Precision m4300) and I'm having problems with the thumbnails on my network drive.
It is a problem that started recently. When I go to a folder containing images on my network hard drive (LaCie 1TB network drive) the thumbnails all regenerate, then disappear, leaving the standard image logo.
This has only started after a couple of days of the thumbnails displaying correctly. I recently changed my power settings, so I restored those, but to no avail. I unchecked the always show icon instead of thumbnail box (it was already unchecked) in the Folder Options area.
When I press Refresh on the explorer window, the thumbnails appear again for a brief flash, then they all disappear again.
Thanks for your help!