Originally Posted by jhawkkw
Unrooting is generally pretty easy. Either flash the factory image, or if it's just rooted stock then manually remove the files through adb or terminal emulator. The major worry with OTA's isn't losing root since it can be protected with apps like VooDoo OTA Rootkeeper and similar apps, it's what they do to the bootloader and for people who haven't rooted yet, but want to. The AT&T and Verizon versions are bootloader locked and updating via OTA could remove the only exploit currently known for getting around it. Also an OTA can remove an exploit needed to obtain root, which is why the motochopper exploit works on every version except the Verizon version out of box. An update to the kernel removed the exploit, however flashing an older stock kernel restored the exploit so that those can successfully root.
Ah, okay! So its not really a problem for people who are rooted (if you use an app to keep root), its more about people who want to root. Thanks!