Drupal 7 Views 3 Contextual Filter - preview works as expected, the actual page not, why?
Found the answer to the problem...

There are path aliases to nodes that were deleted before, and accidentally those aliases look exactly like how the view with arguments should look like. So, there were an alias of 'team/peter-jackson-junior' to 'node/xyz', this overridden the path to the view, but 'node/xyz' was deleted and so it is natural that it gives back 'The requested page could not be found.'.