I have 1.14jb Z ipod touch I have been having a problem with installing books so I thought I would see what permissions installer had. I opened the properties of the file and it was set up as 4755 and I then tried to up its permisssion to 6775 to see if this higher permission would help with the installation of ebooks But when I tried to install a book I now got a "main script excecution failure" when installing or un-installing. I went back to the installer file and the permission was now set at 0775 and nothing I do seems to be able to make it any higher. I have even tried deleting installer.app and putting a backup in it's place. Can anyone help.