This is a strange one, but bear with me.
I am a Virgin Media (UK) customer and have been using their service with no problem for some time.
I just installed 11.04 on my Lenovo N500 laptop and my router does not come up in the list of networks. I tried adding it as a new network and it connected, but I have no gateway to the internet.
I tried the route -n command and it gives a strange IP address - 10.42.43 - my router's IP address is 192.168.0.1
All previous versions of Ubuntu have worked fine and I can connect with a windows laptop and an Itouch.
Any ideas anyone?