Fixed Mine… I couldnt see any editor tools or the option to switch from Visual to HTML. after trying a few things like re-uploading, reinstalling, it finally came back when I went into my user account clicked “ON” the option “Disable the visual editor when writing” saved and then clicked it back “off” again and saved.
Apparently this kick started the visual editor back into gear for me.
WP-Login Frontpage
http://www.theblog.ca/wplogin-front-page
hope that helps. sorry its a little late.
I removed mine in:
wp-includes > widgets.php
remove the line:
<li><a href="http://wordpress.org/" title="<?php echo attribute_escape(__('Powered by WordPress, state-of-the-art semantic personal publishing platform.')); ?>">WordPress.org</a></li>
around line 554 (search the page for http://wordpress.org)