Metadata can't return StringVectorData

[andrewkaufman]

I get this when creating a node that has a userDefault registered for a StringVectorDataPlug

Traceback (most recent call last):
  File "/software/apps/cortex/9.0.0-b1/cent6.x86_64/base/python/2.7/gcc/4.1.2/IECore/curry.py", line 48, in curriedFunction
    return func( *args, **kwds )
  File "/software/apps/gaffer/0.6.0.0_dispatcherFix/cent6.x86_64/cortex/9/gaffer/python/Gaffer/WeakMethod.py", line 67, in __call__
    return m( *args, **kwArgs )
  File "/software/apps/gaffer/0.6.0.0_dispatcherFix/cent6.x86_64/cortex/9/gaffer/python/GafferUI/Menu.py", line 151, in __actionTriggered
    item.command( *args, **kw )
  File "/software/apps/gaffer/0.6.0.0_dispatcherFix/cent6.x86_64/cortex/9/gaffer/python/GafferUI/NodeMenu.py", line 122, in f
    Gaffer.NodeAlgo.applyUserDefaults( node )
  File "/software/apps/gaffer/0.6.0.0_dispatcherFix/cent6.x86_64/cortex/9/gaffer/python/Gaffer/NodeAlgo.py", line 46, in applyUserDefaults
    __applyUserDefaults( nodeOrNodes )
  File "/software/apps/gaffer/0.6.0.0_dispatcherFix/cent6.x86_64/cortex/9/gaffer/python/Gaffer/NodeAlgo.py", line 56, in __applyUserDefaults
    __applyUserDefaults( child )
  File "/software/apps/gaffer/0.6.0.0_dispatcherFix/cent6.x86_64/cortex/9/gaffer/python/Gaffer/NodeAlgo.py", line 56, in __applyUserDefaults
    __applyUserDefaults( child )
  File "/software/apps/gaffer/0.6.0.0_dispatcherFix/cent6.x86_64/cortex/9/gaffer/python/Gaffer/NodeAlgo.py", line 56, in __applyUserDefaults
    __applyUserDefaults( child )
  File "/software/apps/gaffer/0.6.0.0_dispatcherFix/cent6.x86_64/cortex/9/gaffer/python/Gaffer/NodeAlgo.py", line 51, in __applyUserDefaults
    plugValue = Gaffer.Metadata.plugValue( graphComponent, "userDefault" )
RuntimeError: Invalid Argument : Unhandled data of type StringVectorData encountered by DespatchTypedData