Just like in OS9 where it was recommended to rebuild the desktop after installing software, similar applies to OSX in that you should repair permissions. Go to your Utilities folder & open Disk Utility to do this. Alternatively, use your mac utility startup disk to do repairs. Also see these:
http://www.gnutellaforums.com/showth...6094#post96094 (permissions)
http://www.gnutellaforums.com/showth...3462#post93462 (icon bouncing in dock)