I had a significant (and expensive) issue with Downcast where it would continue to download podcasts from wifi -> 3g. I'd get in my car and my phone would be s

I had a significant (and expensive) issue with Downcast where it would continue to download podcasts from wifi -> 3g. I'd get in my car and my phone would be still connected via WiFi to the house, start Downcast to listen to something and then drive off - switching it to 3G and incurring mobile data overage charges.