[solved]Linux demo 1.0.1 installation problems under Ubuntu 7.04.

[GFree]

Verifying archive integrity...Error in MD5 checksums: 14eeebec042d014975dcfe2b40a49fc8 is different from 6d6b6a2cd2e5658b6f7fe5e3038ab0de

All this means is the installer performed an integrity check on itself to see whether it was fully downloaded and error-free. Evidently it wasn't. You should try downloading the demo again.