Dear XFCE developers,

In Thunar 1.8.2 (Debian sid package), when dragging a file to one of the bookmarks in sidebar, at dropping, when not aiming properly, there it is possible that the file gets "added to bookmarks" which results in an error message popup, disturbing the Workflow: "Failed to add new shortcut       The path "foo" does not refer to a directory" 
Very annoying if you want to drag &drop lots of files into bookmarks. So best would be if this would not be not possible at all, and even the option that a bookmark can be placed should be disabled when it's a file which is currently dragged.

Question is: Can the data of the dragged object already be accessed while dragging and without dropping, and when entering the sidebar the right actions are activated/deactivated? 
In comparison, Nemo does also let the file drop as it would create a new bookmark, but then the whole action gets "rejected", and the file's icon flows back to its origin over the screen.

Another special case is when dragging and dropping multiple files and folders. The current behavior is that files get rejected as above, and folders are added to the bookmarks list, which is not the right behavior either, from my perspective. I would suggest to prevent adding to bookmarks if it is mixed content, and if it's only folders, It would be best to ask the user if he really intends to create multiple bookmarks or just wants to drag folders onto one bookmark.