diff --git a/contrib/validateRegionFile.py b/contrib/validateRegionFile.py
new file mode 100644
index 0000000..5bd7e14
--- /dev/null
+++ b/contrib/validateRegionFile.py
@@ -0,0 +1,76 @@
+#!/usr/bin/python
+
+usage = "python contrib/%prog [OPTIONS] <regionfilename>"
+
+description = """
+This script will delete files from the old chunk-based cache, a lot
+like the old `gmap.py -d World/` command. You should only use this if
+you're updating from an older version of Overviewer, and you want to
+clean up your world folder.
+"""
+
+from optparse import OptionParser
+import sys
+import re
+import os.path
+import logging
+
+# sys.path wrangling, so we can access Overviewer code
+overviewer_dir = os.path.split(os.path.split(os.path.abspath(__file__))[0])[0]
+sys.path.insert(0, overviewer_dir)
+
+import nbt
+import chunk
+
+def main():
+    parser = OptionParser(usage=usage, description=description)
+#    parser.add_option("-d", "--dry-run", dest="dry", action="store_true",
+#                      help="Don't actually delete anything. Best used with -v.")
+    
+    opt, args = parser.parse_args()
+    
+    if not len(args) == 1:
+        parser.print_help()
+        sys.exit(1)
+                
+    regionfile = args[0]
+      
+    if not os.path.exists(regionfile):
+        parser.print_help()
+        print "\nFile not found"
+        sys.exit(1)
+    chunk_pass = 0    
+    chunk_total = 0
+    print( "Loading region: %s" % ( regionfile))
+    try:
+        mcr = nbt.load_region(regionfile)
+    except IOError, e:
+        print("Error opening regionfile. It may be corrupt. %s"%( e))
+        pass
+    if mcr is not None:
+        try:
+            chunks = mcr.get_chunk_info(False)
+        except IOError, e:
+            print("Error opening regionfile. It may be corrupt. %s"%( e))
+            chunks = []
+            pass            
+        for x, y in chunks:
+            chunk_total += 1
+            #try:
+            chunk_data = mcr.load_chunk(x, y)
+            if chunk_data is None:
+               print("Chunk %s:%s is unexpectedly empty"%(x, y))
+            else:
+                try:
+                    processed = chunk_data.read_all()
+                    if processed == []:
+                        print("Chunk %s:%s is an unexpectedly empty set"%(x, y))
+                    else:
+                        chunk_pass += 1
+                except Exception, e:
+                    print("Error opening chunk (%i, %i) It may be corrupt. %s"%( x, y, e))
+    else:                
+        print("Error opening regionfile.")
+    print("Done; Passed %s/%s"%(chunk_pass,chunk_total))
+if __name__ == "__main__":
+    main()