Error after fresh install

I just completed a successful install without any problems (at least none that I saw). When I try to do anything in the Admin tabs I get this error:

So here's the error:
The page you requested, , could not be found.

File: system/core/Kohana.php, line: 841
And here's how we got there:

*

Kohana::show_404( )

* system/core/Event.php [209]:

call_user_func_array( Array
(
[0] => Kohana
[1] => show_404
)
, Array
(
[0] =>
)
)

* system/libraries/Router.php [163]:

Event::run( system.404 )

*

Router_Core::setup( )

* system/core/Event.php [209]:

call_user_func_array( Array
(
[0] => Router
[1] => setup
)
, Array
(
[0] =>
)
)

* system/core/Bootstrap.php [49]:

Event::run( system.routing )

* index.php [72]:

require( system/core/Bootstrap.php )