Steps to reproduce? Browser-issue?
Can't seem to figure what this is about.
Go to Sandbox, in the left bar click on "Create new topic". The new topic name input field is now prefilled with "WebTopicCreator".
I don't see this in FF and IE, for some reason. Can you dump the headers you send? (Using i.e. Live HTTP Headers for FF or something?).
Ah! This must have been a local change. Discarding.