diff --git a/overviewer_core/tileset.py b/overviewer_core/tileset.py
index 9ee2305..07951f9 100644
--- a/overviewer_core/tileset.py
+++ b/overviewer_core/tileset.py
@@ -587,7 +587,6 @@ class TileSet(object):
         self.xradius = xradius
         self.yradius = yradius
 
-
     def _rearrange_tiles(self):
         """If the target size of the tree is not the same as the existing size
         on disk, do some re-arranging
diff --git a/overviewer_core/world.py b/overviewer_core/world.py
index 5d9de96..c25a770 100644
--- a/overviewer_core/world.py
+++ b/overviewer_core/world.py
@@ -484,6 +484,8 @@ class RegionSet(object):
             p = f.split(".")
             x = int(p[1])
             y = int(p[2])
+            if x > 10000 or y > 10000:
+                logging.warning("Holy shit what is up with region file %s !?" % f)
             yield (x, y, path)
 
 class RegionSetWrapper(object):