MarsSeed [1] filed a deletion request for kde-thumbnailer- gimpresources [2]:
Abandoned, defunct Qt4 thumbnailer module for KDE4's Dolphin file manager. Upstream not developed since 2013. [a] The KDE4 desktop environment and its corresponding legacy version of the Dolphin application are no longer available in Arch/AUR repos. [a]: https://github.com/aclemens/GimpResourcesThumbnailer/ [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/kde-thumbnailer-gimpresources/
