Did you disable and uninstall the CAPTCHA plugin using Geeklog's plugin manager before deleting the files? It sounds like you may have just deleted the files without doing this step. In that case, Geeklog thinks CAPTCHA is still installed and is trying to open some of its files.
As far as I can tell, Captcha never installed. I got error messages every time I tried to install the plugin, and it never showed up on the listed of enabled plugins. To be double sure, I just checked the plugins list on the site and it's not among the enabled plugins.
I also logged in to phpmyadmin and checked gl_plugins. Not there, either.
Just curious, when you say blew all the files off the server, exactly what files did you delete? It sounds like you may have deleted more than just the CAPTCHA files.
I removed the files I placed on the server in the plugins/captcha directory, the admin/plugins/captcha directory, and the public_html/captcha directory.
As noted, I also removed the lib-portalparts.php from the 'system' directory (it has since been replaced).
- Don