I just returned right after the new year myself. The only exception to what storm is saying is if you stock piled a ton of maps before you left. They will decode to the old spots.
I had 200+ lvl 3s and 100+ lvl 4s and every one so far has decoded to the old spots and match my library exactly.
As for the map locations, there is a sticky with all the info to create a new .map file that will work with UOC. There is even instructions on how to do it.