Subscribing; ''message has been deleted"

Whenever I subscribe to a topic, I’m taken to a page with this message:
 
 
“The Message you are trying to access has been deleted. Please update your bookmarks.”
 
 
It sounds as the subscription is not working, but next time I try to subscribe to the same topic it has the “Unsubscribe” option, so it seems to work.
I hope you can fix this so we don’t get the “update your bookmarks” message.
Thanks.