Plugins Auto-installation bug on WP2.7

Hi all ,

I was happy installing Word Press 2.7 but when I wanted to install some plugins through the new auto-installation system , I get an error as below:

Fatal error: Cannot redeclare class pclzip in /home/host4noc/public_html/wp-admin/includes/class-pclzip.php on line 0

I asked some friends about the issue and they all said that they have the same bug , I am wondering if it has anything to do with permissions (CHMOD)?

I have uploaded a screen shot of the error and I hope you can help me solve it ASAP.

Thank you very much in advance…