I've had this problem on 2 different pc's (although, using internet connection sharing). I've tried firefox and IE. I don't know what the problem is, but when I click on contacts, nothing happens. Now that I can invite someome, I can't open that window either. Both computers running xp. One, sp1 and the other, sp2. I thought it might be my isp (because it works fine at work), but I tried using a proxy, with the same results. Has anyone else run into this? I can't seem to figure out what the problem is.