Just bought World of Goo through the Ubuntu Software Centre on 64-bit Ubuntu 11.04, using a new Lenovo ThinkPad Edge E520. The first time I run it, it starts up but is unusably jerky - it will run smoothly for only a second or so at a time, separated by pauses of a couple of seconds. On exiting World of Goo and starting it up again, it hangs X (with the soundtrack still playing), even after killing the process from a console, and I end up rebooting.