Sorry I was wrong previously. Now I took 2 those libs and patch them manually using the pattern rawx86 gave. So there are no changes at all. There are same authentication problems as before.
fx-8150

ps i chown and chmod libs and of course did update_dyld_shared_cache
pps rawx - you definitely don't have authentication problem? How did you install mac os x? I just expanded the preinstalled distro, it already had user. May it be the problem?

emm... just don't understand anything... finished writing this post i launched "users and groups" in sysprefs, and i managed to use the lock and password window appeared :\ i swear it didn't work when i started writing the post
btw i made another user and now use it, not preinstalled one... now restarted diskutil and it works ok without sudo.

after a while locks don't work again ))))) and disk utility too... %) but it seems it starts working when input any command with sudo in terminal and enter sudo password.. then exit. eg. type sudo su then exit - and all locks work.

in console:

10.06.12 0:18:15,554 postfix/master: fatal: open lock file /Library/Server/Mail/Data/mta/master.lock: cannot open file: Permission denied
10.06.12 0:18:16,556 com.apple.launchd: (org.postfix.master[1290]) Exited with code: 1
10.06.12 0:18:16,556 com.apple.launchd: (org.postfix.master) Throttling respawn: Will start in 9 seconds
10.06.12 0:18:25,567 postfix/master: fatal: open lock file /Library/Server/Mail/Data/mta/master.lock: cannot open file: Permission denied
10.06.12 0:18:26,568 com.apple.launchd: (org.postfix.master[1292]) Exited with code: 1
10.06.12 0:18:26,568 com.apple.launchd: (org.postfix.master) Throttling respawn: Will start in 9 seconds
10.06.12 0:18:35,578 postfix/master: fatal: open lock file /Library/Server/Mail/Data/mta/master.lock: cannot open file: Permission denied
10.06.12 0:18:36,580 com.apple.launchd: (org.postfix.master[1293]) Exited with code: 1
10.06.12 0:18:36,580 com.apple.launchd: (org.postfix.master) Throttling respawn: Will start in 9 seconds

use:
sudo chown postfix /var/lib/postfix/master.lock
sudo chgrp postfix /var/lib/postfix/master.lock
sudo chown postfix /Library/Server/Mail/Data/mta/master.lock
sudo chgrp postfix /Library/Server/Mail/Data/mta/master.lock