In the Fringe episode "The Man From The Other Side", we saw some video from "over there", in which a US flag with only 48 stars was shown. In "Over There, Part 2", we can see a map that shows what the differences are here are there. It appears in the alternate universe:
- Washington is called Southern British Colombia
- California is missing half of the state (perhaps because of the "big one")
- Nevada is called Independent Nevada
- Texas is divided into North and South Texas (+1)
- North and South Dakota are combined into one Dakota (-1)
- Kansas and Oklahoma are combined into one Midland (-1)
- Louisiana is called Louisiana Territory
- Michigan is missing its upper half
- North and South Carolina are combined into one Carolina (-1)
- Virginia and West Virginia are combined into one District of Virginia (-1)
UPDATE: Here is a high-res version of the map:



















