AdWordsAdvisor - 5:32 pm on Apr 10, 2006 (gmt 0)

...To make this appear legitimate we have given this new undocumented feature a name...

Vikingpwr, this is the way that AdWords has worked since October 2003 - and you'll find documentation in the AdWords Help Center - for example:

What is the expanded matching feature?
[adwords.google.com...]

What are keyword matching options?
[adwords.google.com...]

On these pages you will also find the information you need to not have your keywords expanded. In a nutshell, you'll want to use phrase or exact match.

AWA