I've had my mac for a few weeks now. I just installed this iStat nano thing. I have a 24" iMac with 1 gig of ram. When I start my computer up, for a good while (doing all my normal things), the memory usage bar is halfwayish. After having my computer on for a while, the memory usage bar is almost full at all times and stays that way until a restart. However, I don't think I notice a difference in performance. Is this a bug in the program, or is something wrong with my computer? Thanks!