Chris Byrne created the issue

When renaming a folder/file the user is asked if they want to overwrite the destination if it already exists. This rename fails with a conformant WebDAV server as the Overwrite header is set to F.

From RFC 4918 http://www.webdav.org/specs/rfc4918.html#METHOD_MOVE

If a resource exists at the destination and the Overwrite header is "T", then prior to performing the move, the server must perform a DELETE with "Depth: infinity" on the destination resource. If the Overwrite header is set to "F", then the operation will fail.

-Steps to reproduce:*

1. Create two folders "a" and "b"
2. Rename "b" to "a"
3. Yes, you want to rename the existing file

-Expected Results:*

Folder "a" to be deleted, and folder "b" to be renamed to "a"

-Actual Results:*

I/O Error: Cannot rename folder

MOVE /files/b HTTP/1.1[\r][\n]
Authorization: Basic Y2hyaXM6[\r][\n]
User-Agent: Cyberduck/3.4.2 (5902) (Mac OS X/10.5.8) (i386)[\r][\n]
Host: 172.16.50.204[\r][\n]
Content-Length: 0[\r][\n]
Destination: http://172.16.50.204/files/a[\r][\n]
Overwrite: F[\r][\n]
[\r][\n]
HTTP/1.1 409 Precondition Failed[\r][\n]
HTTP/1.1 409 Precondition Failed[\r][\n]
Content-Length: 215[\r][\n]
Connection: Keep-Alive[\r][\n]
[\r][\n]

Where the precondition failure is:

The requested destination "http://172.16.50.204/files/b" is already mapped to a resource