Companies are recognizing that most users are impatient and are installing leaks and updates from sources other than OTA (e.g. recent EVO 4G Froyo update). Motorola, has chosen operate differently, stating the following on their support site: (via Droid Life)
WARNING: Do NOT load the leaked 2.2 upgrade that has been floating around on the Internets. There is currently no upgrade path from that load to the official 2.2 load that will be released by early September. Unless you have some plan to flash your phone back to the current official load, you could be stuck on the leaked version.
