Boy, Ive done it this time. Upgraded my notebook to Leopard. No problems. Ran updates. No problems. Browsing has been very slow, so I took advice of a "googled" suggestion of deleting all items in my <preferences<system config folder. Now no internet. Pinwheel is stuck when I open Network Preferences. Wireless not working. Ethernet isn't recognized when I plug in direct to modem. Suggestions?