I recently switched from a Nexus One on AT&T to an EVO on Sprint. I was downloading a bunch of apps to get my phone back to where I had it before. I was able to download apps earlier today, but now I cannot download any apps from the market at all. They all just appear briefly in the notification icon that they're downloading, then just disappear and never download. I've cleared the data and cache for download manager, market, talk, everything, but I still can't download a single thing from the market. I can't even update existing apps. This is over 3G, 4G, or WiFi. Any ideas?