hi everyone, i've had my new powerbook g4 for about a month, and it started acting up yesterday. everything was really slow, it would "freeze" - i couldn't click on anything, i lost my mouse, and the icons on the upper right (battery, modem, etc) disappeared. i called applecare, and they had me run a disk utility (with everything disconnected - second monitor, mouse). some problems showed up (sorry, i can't remember what) but when we ran it again it seemed fixed. but... same issues happened today when i used my computer. so, i decided to run the hardware test. airport okay, logic board okay, mass storage okay, memory.... ERROR CODE 2MEM/1/4: DIMM1/J31 i have no idea what that means, but lo and behold, when i go to "about this mac" memory shows up as 384mb instead of 512. i called applecare again but was told i should bring it in to the apple store. i was wondering if any of you experts could tell me what's likely to be wrong? is it a case of bad or loose ram (i've never opened up the memory, never dropped it, etc)? is it easily fixable? will the apple store be able to fix it on the spot? i'm just concerned because the apple store is pretty far away, and i can't afford to leave my pb there because i desperately need it this week for some work i'm doing. i'm typing on it right now, but i know it's gonna crash again soon... thanks for any insight and ideas!