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Wrong permissions to "/" in my debian/testing system

I've just accidentally discovered, that as a plain user I'm able to create directories in root directory of my Dabian/testing system.
Investigating the problem, I've found, that I can also rename directories, which is even worse (just imagine creating "/etc.new" with special contents and then renaming "mv /etc /etc.old ; mv /etc.new /etc").
Looking for possible causes, I've found, that stat gives the following status:

stat /
  File: `/'
  Size: 608           Blocks: 1          IO Block: 4096   katalog
Device: 803h/2051d    Inode: 2           Links: 25
Access: (0777/drwxrwxrwx)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2011-05-26 15:27:31.000000000 +0200
Modify: 2011-05-26 15:27:31.000000000 +0200
Change: 2011-05-26 15:27:31.000000000 +0200

Why "Access" is 0777???
In /etc/fstab root is mounted as:

/dev/sda3       /               reiserfs notail,relatime          0       1

I have to check my other machines, but the problem is definitely strange and annoying!
Has anyone found similar phenomenon in his/her system?
TIA & Regards,
Wojciech M Zabolotny, PhD

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