diff --git a/thumbnail/jpegcreator.cpp b/thumbnail/jpegcreator.cpp
--- a/thumbnail/jpegcreator.cpp
+++ b/thumbnail/jpegcreator.cpp
@@ -47,7 +47,7 @@
         const QSize thumbnailSize = imageSize.scaled(width, height, Qt::KeepAspectRatio);
         imageReader.setScaledSize(thumbnailSize); // fast downscaling
     }
-    imageReader.setQuality(0);
+    imageReader.setQuality(75); // set quality so that the jpeg handler will use a high quality downscaler
 
     JpegCreatorSettings* settings = JpegCreatorSettings::self();
     settings->load();