Custom XMP panels in Bridge don't properly set language alternative elements

Question

Using the Bridge Metadata panel, when you edit a custom field that uses the "langalt" type, Bridge doesn't handle this as a language alternative property--it saves the value as a simple text property.
This was an issue when I first tried it in CS3 with the old custom panel SDK. I was hoping it would be fixed in CS4 but it's not.
I've defined a custom panel to set the "Event" property from the IPTC Extended schema. This is a "language alternative" property. I've defined the property like this within the panel:
When you edit the value through the Bridge metadata panel, it generates this for the XMP, saving the value as a simple text property:
] The Event
When you edit the value through the File Info dialog in Bridge or Photoshop (I defined a panel using the generic panel), it correctly sets the element as:
               An Event
Is there something I'm missing?

Answer 1

Thanks for the confirmation. This is a serious and surprising limitation. And if Bridge isn't going to handle complex types properly, it should at least not go ahead and stick invalid data in the field, as it does now.
I guess the only way to update complex types is to use a metadata template, or another tool.