I just installed the latest WP 2.7 available from the wordpress site. When trying to access the login page wp-login.php, firefox prompts for the file to be Open with (choose application) or Saved as, instead of opening the page.
If I choose open with Firefox, it starts downloading and opening multiple windows. even if I close the browser, it reopens another and keeps opening new tabs.
When using IE, it just shows Internet Explorer cannot display this webpage.
The strange thing is, it happened for a few times before it went away, and I was able to login and post some test posts, but now it is starting to do that again.