I did download the new installer from the ATI site, but I can't get it to run in the terminal (or desktop for that matter). I get a 'permission denied' error - even in super user mode. I also tried it after 'init 3' as well, but had the same result.
You have to make it executable.
Execute this command from the console:
chmod +x <filename_here>
eg.
chmod +x check.sh
Then execute it.