Recently I've been experiencing some of the weirdest mac issues I've ever seen. I've had my MBP for about 3 years now. I'm running 10.6.8, 4 GB of RAM and 2.4 core 2 duo. Should be enough for what I am doing. Recently I've been having some strange what appear to be memory leaks. I have to hard reset the machine as least 3 times a day because the whole thing just locks up. I've been monitoring the activity monitor and Firefox takes up a lot of RAM and CPU but not an exhorbitant amount. Whenever I try and quit Firefox I have to force quit it. Also the other day I got the message "not enough room on the startup disc for application memory. I have over 50 GB of free space and at the time about 2.5 GB free of memory, but it was still acting slow. I also have the common issue where spotlight only finds a dictionary entry and no app. And I can't drag things to the trash because I get an error code. Would a fresh install help? Or some sort of diagnostic?