diff --git a/radicale/__init__.py b/radicale/__init__.py
index 52831ee..79689af 100644
--- a/radicale/__init__.py
+++ b/radicale/__init__.py
@@ -177,7 +177,12 @@ class CalendarHTTPHandler(server.BaseHTTPRequestHandler):
         attributes = posixpath.normpath(self.path.strip("/")).split("/")
         if len(attributes) >= 2:
             path = "%s/%s" % (attributes[0], attributes[1])
-            return ical.Calendar(path)
+        elif len(attributes) == 1: # no owner
+            path = attributes[0]
+        else:
+            return
+            
+        return ical.Calendar(path)
 
     def _decode(self, text):
         """Try to decode text according to various parameters."""
diff --git a/radicale/acl/htpasswd.py b/radicale/acl/htpasswd.py
index 250ec90..2ddb918 100644
--- a/radicale/acl/htpasswd.py
+++ b/radicale/acl/htpasswd.py
@@ -56,6 +56,9 @@ def _sha1(hash_value, password):
 
 def has_right(owner, user, password):
     """Check if ``user``/``password`` couple is valid."""
+    if owner is None: # no owner - everybody is allowed
+        return True
+
     for line in open(FILENAME).readlines():
         if line.strip():
             login, hash_value = line.strip().split(":")
diff --git a/radicale/ical.py b/radicale/ical.py
index f8d51e4..076d9be 100644
--- a/radicale/ical.py
+++ b/radicale/ical.py
@@ -135,8 +135,16 @@ class Calendar(object):
 
     def __init__(self, path):
         """Initialize the calendar with ``cal`` and ``user`` parameters."""
+
+        split_path = path.split("/")
+
         self.encoding = "utf-8"
-        self.owner = path.split("/")[0]
+        
+        if len(split_path) > 1:
+            self.owner = split_path[0]
+        else:
+            self.owner = None
+
         self.path = os.path.join(FOLDER, path.replace("/", os.path.sep))
 
     @staticmethod
diff --git a/radicale/xmlutils.py b/radicale/xmlutils.py
index f811f7f..88c98d0 100644
--- a/radicale/xmlutils.py
+++ b/radicale/xmlutils.py
@@ -51,7 +51,7 @@ def _response(code):
 def name_from_path(path):
     """Return Radicale item name from ``path``."""
     path_parts = path.strip("/").split("/")
-    return path_parts[-1] if len(path_parts) > 2 else None
+    return path_parts[-1] if len(path_parts) >= 2 else None
 
 
 def delete(path, calendar):
@@ -129,7 +129,8 @@ def propfind(path, xml_request, calendar, depth):
                 tag = ET.Element(_tag("D", "collection"))
                 element.append(tag)
             elif tag == _tag("D", "owner"):
-                element.text = calendar.owner
+                if calendar.owner:
+                    element.text = calendar.owner
             elif tag == _tag("D", "getcontenttype"):
                 element.text = "text/calendar"
             elif tag == _tag("CS", "getctag") and is_calendar: