http://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-latest.html

1) Thumbnails aren't created in $XDG_CACHE_HOME/thumbnails per the standard the are created in ~/.thumbnails instead
2) When Gwenview creates folder preview images and writes them to Normal and Large folders in .thumbnails (i.e.  the images within the folder icons in browse mode) they do not contain any of the required thumbnail attributes in the standard.   

1) leads to duplication, wasted effort and wasted file space.  especially if one is running gnome 3 since gnome's GNOME::ThumbnailFactory via Nautilus uses $XDG_CACHE_HOME/thumbnails per the standard.  Since we have a standard for this let's try to use it.
2) The folder preview thumbnails are created in the "normal" and "large" directories without the needed attributes.   This results in some unwanted behavior 1) thumbnails are recreated/overwritten in the large directory when the directory itself is viewed (duplication of effort) and 2) thumbnails are abandoned in the normal directory without attributes since these aren't used for browsing.   


Reproducible: Always

Steps to Reproduce:
1.  Clear out the ~/.thumbnails directory to see what going on
2.  Open gwenview and browse to a directory that contains images in subfolders
3.  wait for gwenview to create the folder icons with the imbeded folder "content" images
4.  Open ~/.thumbnails/Normal  and view any of the file's attributes e.g. identify -verbose 46d3a5b6e130d86de2957b641e9e0df2.png
5.  Open ~/.thumbnails/large and view any of the file's attributes e.g. identify -verbose 46d3a5b6e130d86de2957b641e9e0df2.png
6.  Notice missing attributes
7.  Go back to gwenview and go into the folder and wait for thumbnails to be created
8.  Repeat steps 4&5.  Notice that step 4 still has no attributes and 5 does.

 


Expected Results:  
Files always are created with needed attributes per the standard in the standard location.