i have bookmarked two blender-python-api’s 2.63.2 and 2.63.17
by number the 2.63.2 seems newer but when you look at 2.62.2_view3d_utils and 2.63.17_view3d_utils the 2.63.17 seems newer because there is a function more. or has the function (region_2d_to_origin_3d) been deleted?
EDIT: 2.63.2 is the older version but is still on the wiki
the 2.63.2 is obvious the older one because 2 is smaller than 17 _^°