new to mac been finding that safari gets SUPER slow over time....say a day or two. gets to the point where a pop up window says it has timed out. also any downloads get 1980s slow...ridiculous the internet connection is fine. other pcs sharing the connection are unaffected. rebooting always completely clears the problem. using brand new powerbook w/plenty of memory. please help....i'm rebooting as much as on my xp machine.