Yes, there was a change on membergroup and you now need 30 activity for Jr Member.
But, for OP and some other people, they have 42 activity but are still newbies because of a bug.
Please refer to the post made by theymos.
https://bitcointalk.org/index.php?topic=425243.20There's apparently a bug preventing Newbies from being promoted. I'll look into it when I have time. I don't think that there's any major disadvantage to being a Newbie now.