Recently I have got the same problem on Fedora. After researching on the Internet, it has been discussed somewhere (I will add the reference later if I can find it again) that these are normal. It appears that the installer is trying the open *.pack file when they are already gone because they are renamed to *.jar. For some reasons, they are not trying to fix this problem in any newer installer.
Here are the references:
http://forums.fedoraforum.org/showthread.php?t=283237
http://wiki.rosalab.ru/en/index.php/Howto_install_proprietary_Java_from_Oracle