On my iPhone 3G, I stayed jailbroken at 3.1.3 and never updated to the latest version of Pandora. The sound quality on 3G was PERFECT and there weren't so many ads. I purchased an iPhone4 today, updated to iOS4.2, redownloaded my apps, and the sound quality of Pandora seems much poorer with tons of ads. This is SUPER disappointing, as I always have Pandora playing through my car stereo while driving, and it was always near CD quality. Please tell me there is a way to roll back to a previous Pandora version?