I just discovered a bug in the new unified Google Login. If you use the same password for both AdSense, and AdWords, you may encounter a problem.
Today I merged my Google accounts, but when I tried to login to AdWords, I was prompted to sign-in to my AdSense account or register for a new AdWords account.
There are 2 ways around this bug. 1 - Change your AdSense password so that it's not the same as your AdWords password. 2 - Login to Gmail first, and then hit the AdWords sign in page (you will automatically be signed into AdWords.)
I called Google, and they are already working on a fix. I just wanted to give a heads up to fellow AdWords advertisers, and save you a call into tech support.
