Gallery will crash because (maps) crashes because of geocoding (I assume nemo adds some extra info in the thumbnail folder) When I first heard of the problem this is what I did.
-Uninstalled nemo (didnt fix)
-Placed a .nomedia file in DCIM (Gallery didnt crash)
-Deleted .Thumbnails folder (Gallery still worked but its because of .nomedia)
-Deleted .nomedia in DCIM (Gallery worked loaded my camera images)
-Reinstalled Nemo to see if it would still work (Gallery and Nemo worked)
I assume any images/pictures that has gps data in them will have to have its .thumbnails folder deleted. For me, it was only DCIM But check to see if you have any other picture folder that has .thumbnails