Hi,
this is to let you know that we will start redirecting GET requests with non-canonical titles to their canonical equivalent next week. This is done to improve caching, and to ensure reliable purging of cached responses.
The vast majority of clients handle redirects transparently, so at most this will lead to a small slow-down from the redirect. To avoid being redirected, make sure to use underscores instead of spaces, as in "Main_Page".
Thanks,
Gabriel Wicke