I've just updated the process for "un-selling" articles sold through the Fast and Instant Sale options on WLE. Nothing major - jut a reduction of the time limit for people to say "Oh, poop! Didn't mean to do that!" and ask to put the article back into the marketplace (or wherever it was before). It used to be 7 days, but with things moving smoother behind the scenes, there's a more significant risk that the content will already have sold to a client.
The "oops" period is now set at 48 hours. This is not a strict limit, but makes things safer behind the scenes.