I posted this thought on another thread a couple of days ago but forgot where. I noticed using iStat that after a clean boot, SL used twice the memory of a clean Leopard boot after everything settles down. So all these nice tweaks come at a price. I did get back 5GB of disk space but wonder if I'd rather have the memory. By the way, wasn't one of the benefits supposed to be faster and leaner? Yes, but leaner disk space swapped for more memory. Hope the memory mgt is good when I fire up 15 apps. We'll see. Example, you can view running video thumbnails. That's where part of the memory went. etc. I haven't decided it's bad yet. Just an observation. Any feedback?