I'm sorry but I haven't found any doc that summarizes all of the changes in v3. I ended up building with an intel system, so APIC isn't an issue for me (although I think that disabling APIC will reach a much broader area-- I know you've made lots of people happy!).

Is there a docment on the net with changes from v2 so I can see if it is worth chanigng? I'm also curious what was changed even if I don't upgrade. I know there is no new ver of myth, but I am curious...

Thanks

If your sytem is working properly don't bother. There are no new features of note and some potential difficulties.