I am having the same problem mentioned.
The only way I am getting to the internet right now is clicking on "open admin website" in the mce launch manager.
Also I have this computer on a router connected to a windows box to split a cable internet and I keep gettting messages poping up on the windows computer about the network connection. I dont want my linux mce computer to be a server or any of that stuff, all I want is to hook it up to a tv and use it as a media center and also be able to use it as a regular linux box.
I am about to just reinstall ubuntu, let it erase all the my personal files and forget about lmce.
I also have the same problemwith 7.10 "Orbiter - Binary not found".
please attach the /var/log/mce_installer.log files
btw, did you take a look already? i installed millions of LMCE and never saw that.
If you wouldent mind telling me how to do that I would gladly post it for you.