I just got the leopard update, and now (i do not know if it related to leopard or not) but my macbook will connect to the internet, but its very slow and when i close it without shutting it down it says the wi-fi signal is full strength but it won't get online with safari or ichat or anything, till i restart the computer that is. any insight into this problem? is my airport broken? is leopard the reason for it?