diff --git a/50_bubble.py b/50_bubble.py
index 8ebede2..861e45f 100644
--- a/50_bubble.py
+++ b/50_bubble.py
@@ -18,7 +18,7 @@ from utils import *
 from worker import *
 
 
-__version__ = '8.7'
+__version__ = '8.8'
 
 
 class Bubble:
@@ -952,10 +952,13 @@ Deleting a subspace will delete all posts and comments in the subspace, i.e., th
         elif req.path.startswith(self.path + 'u/') or \
              req.path.startswith(self.path + 's/') or \
              req.path.startswith(self.path + 'tag'):
-            page = make_post_page_or_configure_feed(session)
-            if page:
-                return page
-            # NOTE: Fall through to feed generation below.
+            try:
+                page = make_post_page_or_configure_feed(session)
+                if page:
+                    return page
+                # NOTE: Fall through to feed generation below.
+            except ValueError:
+                raise GeminiError(42, "Invalid value")
 
         elif req.path == self.path + 'all':
             session.feed_mode = 'all'
diff --git a/feeds.py b/feeds.py
index acee678..719ef88 100644
--- a/feeds.py
+++ b/feeds.py
@@ -15,7 +15,7 @@ def make_post_page_or_configure_feed(session):
     db = session.db
     req = session.req
     path = req.path[len(session.path):]
-    found = re.match(r'(u|s)/([\w%-]+)(/(post|compose|image|file|issues|admin|tag|index))?(/([\w\d-]+)(.*))?', path)
+    found = re.fullmatch(r'(u|s)/([\w%-]+)(/(post|compose|image|file|issues|admin|tag|index))?(/([\w\d-]+)(.*))?(/)?', path)
     if not found and not path.startswith('tag'):
         return 59, 'Bad request'
 
@@ -26,6 +26,9 @@ def make_post_page_or_configure_feed(session):
         action = found.group(4)
         arg = found.group(6)
         arg2 = found.group(7)
+        if found.group(8) == '/':
+            # Redirect to the correct URL.
+            raise GeminiError(30, session.path + path[:-1] + ("?" + req.query if req.query != None else ""))
     else:
         # Tag filtering All Posts.
         found = re.match(r'(tag)(/([\w\d-]+)(.*))?', path)