Tried to check for updates on my OS X Lion MBP and it gives me "Software Update can't check for updates because of a network problem". The file index-lion-snowleopard-leopard.merged-1.sucatalog couldnt be found on the server swscan.apple.com. Anyone else having issues with this? My internet connection is running just fine. First time I've seen this message as it has been updating previously without any problems.