Wirelessly posted (iPhone 3GS (White, 32GB): Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7C144 Safari/528.16) Hey guys, I've given this some time (I wanted to make sure it wasn't an isolated incident) but is anyone else noticing SUBSTANTIALLY reduced battery life on 3.1? My 3GS is set like this: 3G, Location Services and Bluetooth are on. Wifi is off. Brightness is set at 50%, auto. I commute to work by train, and use the same train every day. I'm on the train for exactly an hour, during which time I listen to my iPhone by A2DP and surf the web, use the FB app, and check the news (AP News app) ... Ever since "upgrading" to 3.1, my battery is down to about 50% when I get to work. That's after an HOUR of use. I realize I've got 3G on (this is Japan, there is no EDGE network to fall back to - 3G is all we've got) and I realize that BT sucks up quite a bit of power. But 50% after only 60-65 minutes of use?! Today I left the screen off, just listening to music without web/FB/whatever and the battery was at 53% when I got to work. That was after 67 minutes of use (at least 40 of which was with the screen off) and 90 minutes of standby. Am I wrong in thinking that's a bit ridiculous? I mean, my old 3G was better than this ... Am I the only one having problems since 3.1?