Updating to latest Boinc on Berkely site, Linux

[D_A]

chmod +x run_manager
chmod +x run_client

Your script on the new install doesn't have execute permission.

edit: sometimes double clicking on the script will do that regardless of the execute permissions. Try opening a console in your BOINC folder (or cd'ing to it in an open terminal) and entering ./run_manager and see if it works.