I like to disable 'sleep' on my iMac running ML, as otherwise I lose my VPN connections. However, if I do that and I leave safari running overnight, more often than not the next morning the machine is frozen with safari consuming all the available memory (I have 8Gb RAM) Actually it doesn't fully hang, if I have patience and go through the beach ball to kill safari , everything comes back to life (which is a great testament to the stability of Mac OS X). However, it is very frustrating having to wait for several minutes every morning until the machine slowly respond to my commands. I've reported this many times to Apple, and I was hopeful that 6.0.2 was going to fix it, given that there was a reported rework of memory allocation. I've seen this also on a MB Pro I have, so I'm sure it is not limited to my iMac. Are others seen the same stuff? Any workarounds? I really like safari and I'd rather not go to Firefox or Chrome :shudder: if I can avoid it.