I almost upgraded my 10.5.8 after all the reports of how stable/fast 10A432 is. Now I am glad that I didn't - after installing on an external partition and booting up (and migrating my settings and apps), there is a big Wifi problem. SL sees the network and connects to it, gets an IP, however I can not access anything on the internet, nor ping any sites from Terminal. When I boot back into 10.5.8 it works. Restarting the router/modem has no effect, and it does this at home and at the office. I see these guys are having the same issue: http://www.insanelymac.com/forum/index.php?showtopic=170328 Any idea what's up and how to solve this? I sure hope now that this is NOT the GM.