"Permission denied" on client side, when trying to move file(s) to another workspace (FileZilla client). Here is a log from client side
Status: Renaming '/production/folder/
EXOJCR-684-first-results.ods' to '/backup/ EXOJCR-684-first-results.ods'
Response: 350 File or directory exists, ready for destination name
Command: RNTO /backup/
Response: 550 /backup/
EXOJCR-684-first-results.ods: Permission denied
Gnome Commander in this case just fails with "Internal error".