Created attachment 76560 [details] a classic folder of artwork comission , all artwork are *.ora, they could have beed *.kra ... One of the reason I open my *.kra and *.ora with a drag and drop from my file explorer over Krita , is because of the inability of Krita open/save dialog to display thumbnails of *.kra and *.ora save. ( witch is ironic, because he can open and save them ). watch picture in attachment to have a better idea. ( Note : I could set thumbnails in Dolphin / Rekonq / Konqueror / plasma-desktop folder view ... but still not in the open/save file dialog... )
Ack. I'm not sure how we can fix this -- it's something that should work out of the box.
This is a bug in kfile. See 318493 it includes a workaround. *** This bug has been marked as a duplicate of bug 318493 ***