By default, my umask is 077. after doing upgrade as explained in http://www.howtoforge.com/forums/showthread.php?t=44013, all apache won't restart... all config file has now -rw------- perms... Hopefully i use backups, so i can restore original permission...
Which config files have these permissions? Also, the ispconfig updater does not change any umasks. If you changed the umask on your system manually, you should restore it to the default.