iPhone 4 will not download full albums over 3G any more...

I download albums a lot when I'm at the gym. I always did with my 3Gs. Over 3G. Now all of a sudden I can not with the iPhone 4. It's telling me the file is more then 20mb and need a wifi connection. Obviously this is false because the phone downloads the album as individual tracks so it never exceeds 20mbs. Plus this is still possible on my iPad. I downloaded a full album over 3G today as a test. Can any one else tell me if they are experiencing this.