Redirect Loop Login Failure

I’ve been having problems with logging into one of my wordpress blogs.

This started on 2.0.x with a redirect loop. This particular blog is running on

Apache: 2.2.11 (Unix)
PHP: 5.2.8
MySQL: 5.0.67-community-log

I upgraded the blog successfully to 2.7 and I no longer visibly get the redirect error.

I went through the Tutorial for login problems and verified the following.

I have deleted all cookies and cache from ie/ff/chrome and I am still getting the login failure.

I verified the site url in the database. http://siteurl.com (no slash or other special characters to mess it up).

I verified the user name and password with MD5 hash in the database.

my htaccess file has the following:

#DirectoryIndex index.php index.html
#Options +FollowSymLinks
#RewriteBase /relative/web/path/

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^(.+) – [PT,L]

RewriteRule ^(.*) index.php
</IfModule>

<Files php.ini>
order allow,deny
deny from all
</Files>

I replaced the login.php file with a new one-just in case

So I am not sure where to go next to fix the problem.

Also this blog literally has no plugins enabled. It never did.