Gimp should install itself as a thumbnailer service for XCF files
Submitted by Chris Mohler
Link to original bug (#551995)
Description
New XCF files (saved from GIMP) have thumbnails, but copied ones do not. Opening in GIMP will create a thumbnail, but it would be nice to have them auto-generated if you are copying over a lot of them - from a backup for example.
Other information: