new character_generators cause strange WML when placing a party in the editor

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I've added some character_generators that I can't find any problems with.
They work well when creating a party in pure WML, but using the editor
there are some problems:

1. The resulting WML is malformed:
    [character]
    alignment="neutral"
    description="Smuggler"
    equipment="short_sword"
    id="smuggler"
    image="units/smuggler.png"
    level="1"
        [character]
        agility="9"
        endurance="8"
        intelligence="10"
        perception="10"
        strength="8"
        will="7"
        [/character]
    [/character]

This is the corresponding generator:
    [character_generator]
    id=smuggler
    description=Smuggler
    level=1
    alignment=neutral
    image=units/smuggler.png
    equipment=short_sword
        [attributes]
        strength=8
        agility=9
        endurance=8
        intelligence=10
        perception=10
        will=7
        [/attributes]
    [/character_generator]

2. The items textbox is empty, one has to add the items (and skills,
probably too) from memory.

1. and 2. work correctly for the original character_generators.

3. on adding any character, a new Wolf Rider is added to the party, so that
after adding the last character, this has to be deleted.

Original issue reported on code.google.com by [email protected] on 22 Oct 2007 at 8:24