Hi, Since upgrading to Lion, my Wi-Fi is dropping signal constantly. sometimes I get a (!) sign, sometimes it shows my connection signal as fine when in fact it's not. I updated to 10.7.1, rebooted my computer & router, tried to setup my connection again, changed location, changed service order, added DNS servers and manually defined the IP address, loaded up Terminal and pinged websites (that last one really did not impress the Lion). nothing worked. It is now impossible for me to work with my iMac. so before I have a nervous meltdown: Please, oh please, do tell me there is a solution. Thank you! Tomas.