System Information
Windows 7 x64

Blender Version
Broken: 705c43b

Short description of error
when drag dropping images in the texture node's path field, it should replace the current texture name with the dragged and dropped one, but instead it does like if you dropped in empty space and adds a new texture node.

Exact steps for others to reproduce the error
Open attached file, replace one of the windows with a file browser in a location where you have some images. Then drag that image over the texture name filed of the texture node. Tooltip shows that the field is recognised correctly by changing from 'add new node' to 'paste name'. But if you drop, it will do as if you dropped in empty space and add a new node.