I wouldn’t think editing theme files would affect the admin pages like that. Strange, I can bring up your /wp-admin/install.php and your upgrade.php and wp-admin.css files with no problem. Maybe take a look at the contents of /wp-admin and compare it to your last backup. Take a look at index.php first, and see what that looks like compared to the backup copy.
* Front to the WordPress application. This file doesn't do anything, but loads
* wp-blog-header.php which does and tells WordPress to load the theme.
* @package WordPress
* Tells WordPress to load the WordPress theme and output it.
* @var bool
/** Loads the WordPress Environment and Template */
I am experiencing the same problem with WordPress 2.9.2 and Firefox 3.6.3. after upgrading to FF 3.6.3.
When logging into WordPress I get a blank screen.
I clear everything from the ‘clear recent history’ option and it works, until I try and return to the Dashboard. Then each time I get another blank screen.