When I tried to create a bootable USB stick using Startup Disk Creator in my Ubuntu 13.10
My source is a Windows 7
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Is the PC dual boot?
OR, is Ubuntu 13.10 (or Windows 7) in a virtual container?
The last stages of creating a 'LiveUSB' needs a compatible kernel and boot files (from somewhere) and Startup Disk Creator writes these to the USB in privileged mode.
This is NOT the just the standard 13.10 install, so anything could be wrong here ..