Problems with Yahoo mail

Recently, I have been facing lot of issues with Yahoo mail. I have an email address made back in 1997 which already gets loads of spam. Spam was never a problem until few days ago. All my important emails are now going to bulk and most of the spam emails are coming to my inbox. Yahoo mail has definetely made some changes to their mail system which is causing lot of such issues. Now I have to go through every single email in the bulk folder to check if there is an important email there. Emails from Orkut are going to bulk...Other than this, people sending me their resumes, payment confirmation emails, e-tickets, bank statements etc. all keep going to the bulk folder. You have a choice of opening an email from the bulk folder and clicking on 'not spam' link on top. This tells the system that the email should goto inbox in future. Unluckily this is not working for me. Messages from Orkut still keep going to the bulk. Does Yahoo hate orkut which is a owned by Google?