I've had my TiBook for a little more than a year now and in all other respects, it's working great. However, recently I've noticed a few problems with my Mac when I try to wake it up from sleep. Like most of you PB users, I never turn my Mac off--I just close the screen and let it go to sleep. But recently every so often when I open the screen up to use my PB, it won't turn on. More specifically, it seems like the hard drive wakes up (I can hear it whirr to life when I press my ear to the case) but the screen doesn't turn on. Another thing that occassionally happens when I try to wake it up by opening the screen is that I'll get this gray box that pops onto the screen saying that I need to restart my computer (in three languages, no less.) No explanation, no error code, nothing. An incident like this happens at least once a week. I have to say that I am very happy that this is the worst of my problems after a year of use, but when my old Dell had issues like this, my first instinct was to just do a clean reinstall of the whole system. This is a major pain in the a**, as I'm sure most of you know, and I want to know if this is even a valid strategy for solving OS issues on the Mac, or if there is some other explanation to this problem. Thanks a lot in advance to everyone!