Just wanted to share with you... This issue has been resolved...
Parse error: parse error, unexpected T_STRING in /home/user/public_html/wp-admin/includes/comments.php on line 164
Recently I upgraded my wordpress blog to wordpress 2.8 from 2.7.1. I uploaded all the new files to the server except wp-contents folder, because it contained my themes and plugins. After I had the new files on the server, I browsed the URL: http://mysite.com/wp-admin to complete the upgrade. However, I received the above mentioned error.
I rechecked and uploaded this file(comments.php) again to the sever. This was a fresh file downloaded with the wordpress installation package. So this should not produce any issue. However, I was still receiving the same error.
Then I looked into the file, at the mentioned line. I found this:
add_filter( 'comment_author', 'floated_admin_avatar' );
There was a space between the single quote and the opening brace. Also, at the end, between the ending brace and the single quote.
I deleted that space and reuploaded the file. This time, the error was gone and the installation was completed.