Since karmic koala, I can't create a bootable USB. Always the same error, it arrives to 96% and then this error " checksums do not match". Also in lucid, meerkat and natty even with fresh install. ...
I've just downloaded Ubuntu 11.04 (Haven't we all?) and created a bootable USB with my existing 10.04LTS installation. However, when I try to boot it it gives me a message similar to: Unknown keyword ...