I've downloaded Ubuntu 11.10 ISO image. Following the steps described on Unbutu.com site I've created a USB stick with the above image (using Startup Disk Creator from a Ubuntu 11.04 PC) Rebooting the system I can see just "INSTALL Ubuntu" as first item in the menu. I cannot see "Try Ubuntu" option.
PS: I've also tried to follow "Install Ubuntu" but in the end the wizard for disk partition is displayed and it suggests to erase my "master" HD.
Any idea?