Currently thumbs.db is only loading snapshots of *.pdf and not *.jpg when you are looking at a folder in Thumbnail view. Essentially when you open a folder and have its View settings as Thumbnails with the Do not cache thumbnails unchecked under advanced folder options you should see a micro snapshot of each image along with file name.
Toggle On/Off: Tools --> Folder Options --> View "Tab" and check/uncheck under Advanced options Do not cache thumbnails
What Steps have been taken:
-- built a new user profile -- toggled Do not cache thumbnails on and off with reboots.
-- removed all instances of the hidden OS file thumbs.db and toggled Do not cache thumbnails with reboots.
-- Installed thumbs.db viewer and found that *.jpg are being loaded into the cache, just not displaying in the folder under Thumbs view
Sites I have reviewed:
My Next Step is to try the following from this site: