Robert_Charlton - 8:54 pm on Sep 19, 2010 (gmt 0)
Note that in this discussion in the Google SEO forum, it's mentioned that Google has clarified what it's reporting, and that the new tool is better reflecting data from Google.com or Google.cc.tld...
Google Keyword tool - Showing very inaccurate data
...the previous version of the Keyword Tool provides search statistics based on Google.com search traffic AND traffic from search partners, while the updated version of the Keyword Tool provides search statistics based on Google.com traffic only.
So there is less "fuzzing" of data than before... certainly a better indication of the monthly search volume you might expect on Google itself.