No Dropcallback In Python?

[markbehm]

Strange but I can't get this to work. If you run this in your shell, you see the dragCallback works just fine, but nothing is triggered when you drop.

Quick:

CODE
import maya.cmds as cmds

cmds.window()
cmds.columnLayout(dgc='print "drag"',dpc='print "drop"')
cmds.showWindow()

or as in maya docs:
CODE
import maya.cmds as cmds

def pythonDropTest( dragControl, dropControl, messages, x, y, dragType ):
    print "test"

cmds.window()
cmds.columnLayout(dgc='print "drag"',dpc=pythonDropTest)
cmds.showWindow()

Still no response. What am I missing? Thanks for any help!
-mark