It would appear that the network didn't go down, I 've presumably picked up the lap-top and pressed a key on which turned on "filters" - can anyone suggest which key this could be, as I've experienced this before and lost network flights. I had a completely blank display (as in no a/c shown) and when I tried to click on a particular flight that I'd been following, I go a pop up box saying this flight couldn't be displayed as filters were on, although I've never set any filters - hence the blank screen? - and it asked me if I wished to cancel filters, which I did, network flights were immerdiately displayed correctly again. Has anyone else experienced, or can explain what I did? MTIA. CGJon.