--- /tmp/dovecot.py	2016-07-21 15:30:46.572617096 -0700
+++ dovecot.py	2016-04-20 11:20:50.958601661 -0700
@@ -81,18 +81,18 @@
     return self._untagged_response(typ, dat, 'METADATA')
 
 def imap_setmetadata(self, mailbox, desc, value, shared=False):
     if value:
-        value = '"' + str(value).strip('"') + '"'
+        value = quote(value)
     else:
         value = "NIL"
 
     if shared:
         typ, dat = self._simple_command('SETMETADATA', mailbox, 
-                                        "(/shared%s %s)" % (desc,value))
+                                        "(/shared/%s %s)" % (desc,value))
     else:
         typ, dat = self._simple_command('SETMETADATA', mailbox,
-                                        "(/private%s %s)" % (desc,value))
+                                        "(/private/%s %s)" % (desc,value))
     return self._untagged_response(typ, dat, 'METADATA')
 
 # Bind the new methods to the cyruslib IMAP4 and IMAP4_SSL objects