I have umask set to 077 (in /etc/profile) and have found some .la files to have their permissions incorrectly set to 600. I think this is due to fix_libtool_files.sh using this umask when it shouldn't be. This also appears to be the case with opengl-update, as described in bug #83115.
already been fixed *** This bug has been marked as a duplicate of 73435 ***