deep inheritence broken

Part of the problem as described by DuyNguyen to the user mailing list:

I have the following domain class: Item, ItemWithPrice,
ItemWithPriceAndImage

I execute the following:
new ItemWithPriceAndImage(name: "Pen", price: 10, imageURL: "....").save()
I look up the database and see that the new record have price = NULL

Why didn't the price get inserted?
The "class" column of the database is set to ItemWithPriceAndImage, but I
think ItemWithPriceAndImage "is-a" ItemWithPrice, so every property should
be persisted as well.

Moreover, what if I add another class called
ItemWithPriceAndImageAndDescription?

class Item{
String name
}

class ItemWithPrice extends Item{
int price
}

class ItemWithPriceAndImage extends ItemWithPrice{
String imageURL
}

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It's my (masukomi) opinion that anything deeper than one level of inheritence in domain models is just completely broken, as in just about everything that should come via inheritence doesn't.