After deleting all files from a previous installation I installed WP2.2. I modified the wp-config.php file to name the database and user and db password, and and was able to access the install page. I was advised that the install was complete, and I was able to access the dummy WP page at my blog's URL.
HOWEVER, when I tried to log in, using the "admin" username and the password given, the following message displayed:
Your session has expired.
ERROR: Incorrect password
I have tried getting new passwords via email, using the normal "lost your password?" procedure and even using emergency.php. I have tried refreshing the page. But it doesn't seem to matter to the login code -- it always rejects the passwords I enter and gives me the same message.