Ticket #6975 (new defect)

Description

I did a new install of 2.5.1 on Windows 2003, PHP 5.2.0, MySQL 5.0.22.

I start out going to http://example.com/wp-admin/ and get redirected to http://example.com/wp-login.php?redirect_to= to login, then I enter my username and password and hit submit and it goes to http://example.com/wp-login.php, which is blank. If I then manually go to http://example.com/wp-login.php or http://example.com/wp-admin it takes me to the dashboard just fine.

PHP's display_errors is On, and I'm not getting any errors, just a blank screen.

There are a lot of posts about this on the support forums, but no solid fixes. The only plugin I'm running is Askimet, and the problem happens even when it is deactivated. It happens with the default theme too.