Re: Activity Stream bug
About point 2,
I do have the same problem.
First I get also a page which says ‘Page not found’ and second the URL gives
../activity/delete/120?_wpnonce=6dfc05a1bb (probably the item i have tried to delete)
Third: the deleted item is still on the activity stream.
I have tested it as a site admin and as an user.
How can I resolve this?