Permission denied while trying to access the Plugins page after the upgrade to 2.3

Hello,

I've recently upgraded to gallery v2.3 and have a weird problem. I'm getting this 500 Internal Server Error while trying to access the Plugins page in the administration panel.

In the event logs I get this:
Tue 27 Jan 2009 01:36:09 AM EST Gallery Error Link [ipaddr] ERROR_PERMISSION_DENIED

And here are the details of the above error:

Date Tue 27 Jan 2009 01:36:09 AM EST
Type Gallery Error
Location http://www.domain.com/main.php?g2_view=search.SearchScan&g2_form%5BuseDefaultSettings%5D=1
User Id 6
Client [ip-address]
Summary ERROR_PERMISSION_DENIED
Referer http://www.domain.com/main.php?g2_view=core.SiteAdmin&g2_subView=core.AdminEventLogViewer
Details

Error (ERROR_PERMISSION_DENIED)in modules/core/classes/GalleryView.class at line 168 (gallerycoreapi::error)
in main.php at line 325 (galleryview::loadview)
in main.php at line 104
in main.php at line 88

Request variables: Array
(
[view] => search.SearchScan
[form] => Array
(
[useDefaultSettings] => 1
)

)

Any help will be greatly appreciated.