My Nexus One Battery Life Dropped Dramatically Since Upgrading to Android OS 2.2 FRF91

Something odd has happened since my Nexus One was upgraded from Android OS 2.2 FRF50 (build number) to FRF91 this past weekend: The Nexus One now has terrible battery life. Prior to the upgrade, the Nexus One was my primary voice and data phone. I charged it every evening, turned off its radio before sleeping, turned its radio after waking up to find it at 100%. This is still the case. I usually made a couple of phone calls (not a heavy voice user), browsed the web, read my email, and ran a couple of apps throughout the day.