Got the Evo (first android phone for me) and promptly started installing apps. At some point, my camera stopped working. When launching the camera app, the screen would go black for a second, then back to home screen. Installed the OTA update (also had the security error on SD card), then installed apps again. Same problem after so many apps installed. I don't know the app limit, but it's not out of internal storage. If I uninstall enough apps, camera works again. All other apps worked normally throughout. Any ideas? Thanks!