I've got a 12" PB G4 1.5 with Leopard installed on it. I've almost never actually shut the computer down. I just close the lid and let it go to sleep. A few times recently, when I go to use it a couple days later, the battery is completely dead, as if it has stayed on the whole time. The time is reset to 1970, all passwords are forgotten, and it needs to reindex Spotlight. After I let it charge for a few minutes, I restart it and it seems to be back to normal, except for the reindexing needs to continue. I let it do this, then read up on some tips, and found the PMU reset. After resetting the PMU, it turned on exactly as it does when it has the problem: no passwords, wrong time, reindexes Spotlight. Any thoughts or advice? This only happens about once a week or so. The rest of the time, the computer runs great. It holds a charge and works as it always has. I'm not sure what to do at this point. Thanks.