[Erwin]

From here:
http://www.vbulletin.com/forum/showthread.php?t=151512

If you see this email, report it to Jelsoft:

Hello ********,

Thank you for purchasing a vBulletin license. We know it is hard for you to deal with the issue of being a victim of an illegal vbulletin software.

The reason I am contacting you is because you are still hosting the illegal vbulletin on your webhost. Please do not be alarmed that this is not against the law since you have bought a license, but our database is getting errors cause some of the files there is'nt the correct vbulletin files.

The database tells us if the files you are using is true. We will not close down your site or contact your webhost. We just want to solve this problem and move on. The fix is simple which only requires you to upload a few files to your forum directory.

Download:http://home.******.com/2005-8/386981/admincp.zip

I have uploaded these files to my personal webhost for you to gain easy access to. Download the file, extract into your computer, and upload the files to your FORUM/ADMINCP folder. The files must be overwritten also.

For Safety and privacy issues, please delete this email after uploading the files to your directory. Please do not reply to this email as our webserver is having trouble getting incoming email for a month already. If you need to contact me, my personal email is vb.******@gmail.com.

Thank you ****,

*********
Jelsoft Enterprises Ltd.

The gmail email address should give it away.