Wirelessly posted (Blackberry8700c: BlackBerry8310/4.5.0.69 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/120)
This is a constant challenge since many local users don't know that google.(Country code) is available, so they use that when instead their local site would give better results. Google.com/ncr is by far the easiest way to solve this issue.
The ad trageting is wholly intentional since commercial offers are inherently local (or country-based) and advertisers get angry if their ads are shown to those out of country who have no likelihood of making commercial transactions there.