Comment 3 for bug 1343099

Link to LP bug:

Drag and drop sometimes doesn't do anything. I can select (a) file(s) and move them to another thunar window or the desktop, but upon releasing the mouse button nothing happens besides the animations (of the selected files flying back to its origin) that occurs when drag and drop is not possible because of legitimate reasons (no permissions, other app doesn't support drag and drop).
Strangely this behavior isn't always consistent system-wide. For example, I noticed drag and drop not functioning with an image file from a thunar window to Gimp, but it did at this time between two folders.
When drag and drop between two thunar windows isn't working, neither is it within one window (from the active map to a favorite map in the side-bar)
I noticed this behavior on my previous install with was an upgrade from 13.10 to 14.04 (32-bit) as well.