The shared progress dialog currently places a status icon in the system tray using an icon name called "stock_folder-copy" which is as uncommon as it can get. I don’t see any issue with just using Thunar’s application icon instead which is available in any case.
(In reply to comment #0) > The shared progress dialog currently places a status icon in the system tray > using an icon name called "stock_folder-copy" which is as uncommon as it can > get. OK, git master seems to use GTK_STOCK_DIRECTORY instead. I still think the more specific application icon would be a better choice instead to identify the application in the system tray.