I installed a few popular, tested apps, along with the "clean" Sprint ID, and that is all. After a bit of time, Handcent would start, and shutdown. No force close or errors, and the same goes for some other apps (immediate shutdown after launching). The only way to get it working again is to restart the phone. I have a Nexus One and Evo, each with over 200 apps, and have never seen this problem. Any ideas? Thanks.