I was just checking some search results to one of my own sites, and found that searching drupal content translation spanish (without quotes) currently list two results (different URLs) to the identical content/page, currently shown at positions #7 and #8 on the Google results for me. But, the second URL listed is set up to redirect to the first (and I've checked the redirection is working correctly).
Now, I understood that Google would never do this. Am I just wrong, or have they changed something? Not that I have a problem with the page being listed twice :)