I played around a little, works smooth in most cases.
I dragged a file from the home folder into another folder of the
directory tree (one of my folders, not a shared one), and got a dialog
with title "Command output:" and contents "Error: <empty space>\n done
in 0.011s". However, the file was copied into the destination folder.
What is the error? Should it be moved instead? (maybe)
Other than that, I managed to upload a 50MB file from the desktop (then
also shortly showing a dialog during upload). A 200MB file failed
silently (well well... or else it is still at it)
Suggestion: don't call it "Trash", but "Shredder", to make clear that
you cannot look into the trash and take files out again.