Battery drain.
Pretty simple...until I updated to Gingerbread, I could use my DroidX all day long for mail, calls...etc. For months and months. Bluetooth was always on, but only actually came on when it connected to a paired device. Now? I am lucky to get 6 or so hours of life from my battery, with the same settings. GPS off, screen auto, wi-fi off....this upgrade, from that perspective has been, was just awful. Trying every trick I can find to get something worthwhile from battery usage. Wonder if I can go back to Froyo? (No, my device is not rooted).