i have two problems with my macbook c2d that seemed to have come up in the past week. although they aren't serious, it is annoying and i would like to fix them soon. 1. apparently, my free ram seems to get sucked up alot faster than it did before, with less programs it's already down to under 50 mb of memory, but the inactive memory is very high up there. is this something i need to keep my eye on? any way to fix this, or is this okay? 2. battery life for my computer is now half that of when i first had it. back in december, i could go 3-4 hours on the battery, now, i can barley go 2 hours, and that's if i'm lucky. i re-calibrated the battery the other day and not too much has improved. anyway to get my battery life back, because i don't want to be tethered to my outlet plug with this thing. and a thought: should i install 10.4.9 and how should i do this? this is my first os update with macs, and i heard about the crashing horror stories associated with it. is there anything i can do to help prevent the crashing, etc? thanks!!!