diff --git a/.gitignore b/.gitignore
index a235ff1..b011a47 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+__pycache__
 build/
 cache/
 dist/
diff --git a/photoapp/daemon.py b/photoapp/daemon.py
index 6c7d98f..2234cd9 100644
--- a/photoapp/daemon.py
+++ b/photoapp/daemon.py
@@ -193,7 +193,7 @@ class PhotosWeb(object):
             s.commit()
 
         if newtag:
-            s.add(Tag(title=newtag, description=newtag.capitalize(), slug=slugify(newtag)))
+            s.add(Tag(title=newtag.capitalize(), name=newtag, slug=slugify(newtag)))
             s.commit()
 
         photos, num_photos = get_photos()
@@ -230,6 +230,10 @@ class PhotosWeb(object):
             else urlparse(cherrypy.request.headers["Referer"]).path
         raise cherrypy.HTTPRedirect(dest, 302)
 
+    @cherrypy.expose
+    def error(self, status, message, traceback, version):
+        yield self.render("error.html", status=status, message=message, traceback=traceback)
+
 
 @cherrypy.popargs('date')
 class DateView(object):
@@ -345,11 +349,20 @@ class PhotoView(object):
         # uuid = uuid.split(".")[0]
         s = self.master.session()
         photo = photo_auth_filter(s.query(PhotoSet)).filter(or_(PhotoSet.uuid == uuid, PhotoSet.slug == uuid)).first()
+        if not photo:
+            raise cherrypy.HTTPError(404)
         yield self.master.render("photo.html", image=photo)
 
     @cherrypy.expose
     @require_auth
     def op(self, uuid, op, title=None, description=None, offset=None):
+        """
+        Modify a photo
+        :param op: operation to perform:
+         * "Make public":
+         * "Make private":
+         * "Save": update the photo's title, description, and date_offset fields
+        """
         s = self.master.session()
         photo = s.query(PhotoSet).filter(PhotoSet.uuid == uuid).first()
         if op == "Make public":
@@ -464,7 +477,8 @@ def main():
     tpl_dir = os.path.join(APPROOT, "templates") if not args.debug else "templates"
 
     web = PhotosWeb(library, tpl_dir)
-    web_config = {}
+    web_config = {'error_page.403': web.error,
+                  'error_page.404': web.error}
 
     def validate_password(realm, username, password):
         print("I JUST VALIDATED {}:{} ({})".format(username, password, realm))
diff --git a/photoapp/dateoffset.py b/photoapp/dateoffset.py
new file mode 100644
index 0000000..f82603d
--- /dev/null
+++ b/photoapp/dateoffset.py
@@ -0,0 +1,27 @@
+import argparse
+from photoapp.library import PhotoLibrary
+from photoapp.types import PhotoSet
+from datetime import timedelta
+
+
+def set_offset(library, uuid, offset):
+    s = library.session()
+    photo = s.query(PhotoSet).filter(PhotoSet.uuid == uuid).first()
+    print("Original date: {}".format(photo.date))
+    photo.date_offset = offset
+    photo.date = photo.date_real + timedelta(minutes=offset)
+    print("New date:      {}".format(photo.date))
+    s.commit()
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Photo date offset manipulation tool")
+    parser.add_argument("-u", "--uuid", required=True, help="photo uuid")
+    parser.add_argument("-o", "--offset", required=True, type=int, help="offset in minutes")
+    args = parser.parse_args()
+    library = PhotoLibrary("photos.db", "./library/", "./cache/")
+    set_offset(library, args.uuid, args.offset)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/templates/create_tags.html b/templates/create_tags.html
index 7470cc7..da44136 100644
--- a/templates/create_tags.html
+++ b/templates/create_tags.html
@@ -1,6 +1,7 @@
 {% extends "page.html" %}
-{% set title = "Placeholder Title" %}
-{% set subtitle = "Foobar" %}
+{% block title %}Tagging {{ num_photos }} photo{% if num_photos > 1 %}s{% endif %}{% endblock %}
+{% block subtitle %}{% endblock %}
+{% block buttons %}{% endblock %}
 
 
 {% block body %}
@@ -25,7 +26,7 @@
                     {% if fromdate %}<input type="hidden" name="fromdate" value="{{ fromdate }}" />{% endif %}
                     {% if uuid %}<input type="hidden" name="uuid" value="{{ uuid }}" />{% endif %}
                     <input type="hidden" name="remove" value="{{ tagi.tag.uuid }}" />
-                    <input class="submit-link" type="submit" value="{{ tagi.tag.title }}" />
+                    <input class="submit-link" type="submit" value="{{ tagi.tag.name }}" />
                 </form>
             </li>
         {% endfor %}
@@ -40,7 +41,7 @@
                     {% if fromdate %}<input type="hidden" name="fromdate" value="{{ fromdate }}" />{% endif %}
                     {% if uuid %}<input type="hidden" name="uuid" value="{{ uuid }}" />{% endif %}
                     <input type="hidden" name="tag" value="{{ tag.uuid }}" />
-                    <input class="submit-link" type="submit" value="{{ tag.title }}" />
+                    <input class="submit-link" type="submit" value="{{ tag.name }}" />
                 </form>
             </li>
         {% endfor %}
diff --git a/templates/error.html b/templates/error.html
new file mode 100644
index 0000000..88544d4
--- /dev/null
+++ b/templates/error.html
@@ -0,0 +1,17 @@
+{% extends "page.html" %}
+{% block title %}{{ status }}{% endblock %}
+{% block subtitle %}{% endblock %}
+{% block buttons %}{% endblock %}
+
+{% block body %}
+
+<div class="photo-feed">
+    <div>
+        <p>{{ message }}</p>
+    </div>
+    <div>
+        <pre>{{ traceback }}</pre>
+    </div>
+</div>
+
+{% endblock %}