Lars,
Great! :) I am just trying to get as much information as possible about content repository because so few people have a good understanding of it.
I can see from the content repostiory docs that you _rarely_ would subtype cr_items, but if you have non-versioned attributes, that is exactly what you should do.
Did you actually test the speed difference between the denormalized version and a normalized version of bt_bugs? I am just curious.
Thanks.