File Manager: Wrong error "Cannot move into its own subdirectory"

[mgutt]

Tried to move a file from:

/mnt/disk2/test/4GB.bin

to:

/mnt/disk2/test/foo/

returns the following error:

Cannot move directory into its own subdirectory

This error is only valid if the source is a directory (as it can't be recursively copied/moved into a subdirectory of its own). Probably a file check is needed.

Screenshot: