Index: /ValBot/find_external_images.py
===================================================================
--- /ValBot/find_external_images.py	(revision 1167)
+++ /ValBot/find_external_images.py	(revision 1168)
@@ -14,5 +14,5 @@
 pages_checked = 0
 oni2_images = 0
-file_formats = ('.jpg', '.jpeg', '.png', '.gif', '.svg', '.ogg')
+file_formats = ('.jpg', '.jpeg', '.png', '.gif', '.svg')
 
 # Scrapes the HTML at the given URL for image tags
Index: /ValBot/uncapitalize_image_suffixes.py
===================================================================
--- /ValBot/uncapitalize_image_suffixes.py	(revision 1168)
+++ /ValBot/uncapitalize_image_suffixes.py	(revision 1168)
@@ -0,0 +1,57 @@
+import os
+import pywikibot
+
+from pywikibot.bot import QuitKeyboardInterrupt
+from pywikibot import pagegenerators
+
+def main(*args):
+    genFactory = pagegenerators.GeneratorFactory()
+    #allowed_suffixes = ('jpg', 'jpeg', 'png', 'gif', 'svg')
+    allowed_suffixes = []
+    images_checked = 0
+    capped_suffixes = 0
+    site = pywikibot.Site()
+
+    try:
+        allowed_suffixes = site.siteinfo.get('fileextensions', get_default=False)
+    except KeyError:
+        pywikibot.stdout('Failed to get the wiki\'s allowed image suffixes!')
+        return
+    else:
+        allowed_suffixes = [item['ext'].lower() for item in allowed_suffixes]
+        pywikibot.stdout('Wiki accepts image suffixes {0}.'.format(allowed_suffixes))
+
+    generator = site.allimages()
+    pywikibot.stdout('Looking for images with capitalized suffixes...')
+    for page in pagegenerators.PreloadingGenerator(generator, 100):
+        images_checked = images_checked + 1
+        suffix = page.title().split('.')[-1]
+        if suffix.lower() in allowed_suffixes:
+            if suffix != suffix.lower():
+                # We found a page which has an allowed suffix but which is capitalized
+                pywikibot.stdout('{0}'.format(page.title()))
+                capped_suffixes = capped_suffixes + 1
+
+                # Rename page to have lowercase suffix
+                new_page_title = os.path.splitext(page.title())[0] + '.' + suffix.lower()
+                pywikibot.stdout('Moving page to {0}...'.format(new_page_title))
+                page.move(new_page_title, reason='use lowercase file suffix', movetalk=True, noredirect=True)
+
+                # Warn the user if the page we moved had references to it
+                wiki_links = []
+                wiki_links = list(page.backlinks())
+                file_links = []
+                file_links = list(page.usingPages())
+                if len(wiki_links) or len(file_links):
+                    pywikibot.stdout('However this page is referenced by:')
+                    for ref in wiki_links:
+                        pywikibot.stdout('    {0}'.format(ref.title()))
+                    for ref in file_links:
+                        pywikibot.stdout('    {0}'.format(ref.title()))
+        else:
+            pywikibot.stdout('Found disallowed suffix {0}!'.format(suffix)) # should never happen
+
+    pywikibot.stdout('Checked {0} images and found {1} with capitalized suffixes.'.format(images_checked, capped_suffixes))
+
+if __name__ == '__main__':
+    main()