Macbook 2GHz Core Duo 2GB of Corsair RAM (1GBx2) Okay, maybe this is completely normal, I don't know. It just seems kinda weird. When I turn on my Macbook and log in, I can display my widgets, and before opening anything (other than those widgets, about 13 of them, some complicated, some just the Google search and dictionary), iStat Nano's RAM "tracker" displays that my RAM usage is slowly climbing. Eventually, my "used" RAM climbs just past a gig. However, only about 150MB is Active, about 200MB is Wired, and nearly *700(!)* Megs is inactive. Why does my Macbook use a gig of RAM, but keep 70% of it inactive? Is that normal? Is there some type of "cache" I need to clear, or what? Thanks.