Back in August, gaming website Kotaku posted scans of what purported to be a leaked Halo 3 manual on their site. Not knowing if they were genuine, they put them up and let the readership decide whether to give them credence or not.

Now it seems that Internet Investigator James Young has sent Kotaku a rather odd letter. Kotaku has posted the entirety of the letter, but it's worth pulling out a few select pieces for examination:

It has come to Microsoft's attention that your website includes material which is in violation of Microsoft's intellectual property rights. Content currently residing within your computer system infringes on the trademark rights of Microsoft Corporation and constitutes an unauthorized activity relating to Microsoft computer programs.

So, first off, disclaimers: I Am Not A Lawyer and This Article Does Not Constitute Legal Advice.

Secondly, trademark infringement. This usually refers to use of a registered trademark within a certain context. These are protected to prevent companies from creating me-too products to confuse consumers.