I have suspected this on every ROM I have run (stock 2.1, all tranquility roms, and now rubix 0.3 (which I love except the single unexpected shutdown of the phone once). My screen just doesn't turn off no matter what the settings/display/screen timeout is set to (30 sec, 1 min...) I test it by turning on the phone, sliding to unlock and then staring at my homescreen with a stopwatch. It can be 5-10 minutes before it turns off. I have interrogated with spareparts and the phone does have a high percentage of "running" from bluetooth and wifi, but isn't the screen supposed to shut off even with those background processes running?? I don't have anything special installed for power management, just stock stuff. I went to the market and found some power managers but I don't have any confidence a third party app will solve this problem. Anybody else noticing this and anyone have a clue how to solve?